diff --git a/external/leaflet-src.js b/external/leaflet-src.js
index ff8a1d00..d3d56357 100644
--- a/external/leaflet-src.js
+++ b/external/leaflet-src.js
@@ -7,7 +7,7 @@
 var oldL = window.L,
     L = {};
 
-L.version = '0.7.3';
+L.version = '0.7.7';
 
 // define Leaflet for Node module pattern loaders, including Browserify
 if (typeof module === 'object' && typeof module.exports === 'object') {
@@ -519,9 +519,8 @@ L.Mixin.Events.fire = L.Mixin.Events.fireEvent;
 		gecko = ua.indexOf('gecko') !== -1,
 
 	    mobile = typeof orientation !== undefined + '',
-	    msPointer = window.navigator && window.navigator.msPointerEnabled &&
-	              window.navigator.msMaxTouchPoints && !window.PointerEvent,
-		pointer = (window.PointerEvent && window.navigator.pointerEnabled && window.navigator.maxTouchPoints) ||
+	    msPointer = !window.PointerEvent && window.MSPointerEvent,
+		pointer = (window.PointerEvent && window.navigator.pointerEnabled) ||
 				  msPointer,
 	    retina = ('devicePixelRatio' in window && window.devicePixelRatio > 1) ||
 	             ('matchMedia' in window && window.matchMedia('(min-resolution:144dpi)') &&
@@ -534,38 +533,8 @@ L.Mixin.Events.fire = L.Mixin.Events.fireEvent;
 	    opera3d = 'OTransition' in doc.style,
 	    any3d = !window.L_DISABLE_3D && (ie3d || webkit3d || gecko3d || opera3d) && !phantomjs;
 
-
-	// PhantomJS has 'ontouchstart' in document.documentElement, but doesn't actually support touch.
-	// https://github.com/Leaflet/Leaflet/pull/1434#issuecomment-13843151
-
-	var touch = !window.L_NO_TOUCH && !phantomjs && (function () {
-
-		var startName = 'ontouchstart';
-
-		// IE10+ (We simulate these into touch* events in L.DomEvent and L.DomEvent.Pointer) or WebKit, etc.
-		if (pointer || (startName in doc)) {
-			return true;
-		}
-
-		// Firefox/Gecko
-		var div = document.createElement('div'),
-		    supported = false;
-
-		if (!div.setAttribute) {
-			return false;
-		}
-		div.setAttribute(startName, 'return;');
-
-		if (typeof div[startName] === 'function') {
-			supported = true;
-		}
-
-		div.removeAttribute(startName);
-		div = null;
-
-		return supported;
-	}());
-
+	var touch = !window.L_NO_TOUCH && !phantomjs && (pointer || 'ontouchstart' in window ||
+		(window.DocumentTouch && document instanceof window.DocumentTouch));
 
 	L.Browser = {
 		ie: ie,
@@ -1191,7 +1160,7 @@ L.LatLng.prototype = {
 	distanceTo: function (other) { // (LatLng) -> Number
 		other = L.latLng(other);
 
-		var R = 6367000.0, // earth radius in meters
+		var R = 6378137, // earth radius in meters
 		    d2r = L.LatLng.DEG_TO_RAD,
 		    dLat = (other.lat - this.lat) * d2r,
 		    dLon = (other.lng - this.lng) * d2r,
@@ -1512,7 +1481,7 @@ L.CRS.EPSG3857 = L.extend({}, L.CRS, {
 
 	project: function (latlng) { // (LatLng) -> Point
 		var projectedPoint = this.projection.project(latlng),
-		    earthRadius = 6367000.0;
+		    earthRadius = 6378137;
 		return projectedPoint.multiplyBy(earthRadius);
 	}
 });
@@ -1632,15 +1601,16 @@ L.Map = L.Class.extend({
 		var paddingTL = L.point(options.paddingTopLeft || options.padding || [0, 0]),
 		    paddingBR = L.point(options.paddingBottomRight || options.padding || [0, 0]),
 
-		    zoom = this.getBoundsZoom(bounds, false, paddingTL.add(paddingBR)),
-		    paddingOffset = paddingBR.subtract(paddingTL).divideBy(2),
+		    zoom = this.getBoundsZoom(bounds, false, paddingTL.add(paddingBR));
+
+		zoom = (options.maxZoom) ? Math.min(options.maxZoom, zoom) : zoom;
+
+		var paddingOffset = paddingBR.subtract(paddingTL).divideBy(2),
 
 		    swPoint = this.project(bounds.getSouthWest(), zoom),
 		    nePoint = this.project(bounds.getNorthEast(), zoom),
 		    center = this.unproject(swPoint.add(nePoint).divideBy(2).add(paddingOffset), zoom);
 
-		zoom = options && options.maxZoom ? Math.min(options.maxZoom, zoom) : zoom;
-
 		return this.setView(center, zoom, options);
 	},
 
@@ -2782,7 +2752,7 @@ L.TileLayer = L.Class.extend({
 		}
 
 		if (options.bounds) {
-			var tileSize = options.tileSize,
+			var tileSize = this._getTileSize(),
 			    nwPoint = tilePoint.multiplyBy(tileSize),
 			    sePoint = nwPoint.add([tileSize, tileSize]),
 			    nw = this._map.unproject(nwPoint),
@@ -3567,10 +3537,8 @@ L.Marker = L.Class.extend({
 
 	update: function () {
 		if (this._icon) {
-			var pos = this._map.latLngToLayerPoint(this._latlng).round();
-			this._setPos(pos);
+			this._setPos(this._map.latLngToLayerPoint(this._latlng).round());
 		}
-
 		return this;
 	},
 
@@ -3593,7 +3561,7 @@ L.Marker = L.Class.extend({
 			if (options.title) {
 				icon.title = options.title;
 			}
-			
+
 			if (options.alt) {
 				icon.alt = options.alt;
 			}
@@ -4228,6 +4196,7 @@ L.Marker.include({
 		if (content instanceof L.Popup) {
 			L.setOptions(content, options);
 			this._popup = content;
+			content._source = this;
 		} else {
 			this._popup = new L.Popup(options, this)
 				.setContent(content);
@@ -4420,7 +4389,9 @@ L.FeatureGroup = L.LayerGroup.extend({
 			layer = this._layers[layer];
 		}
 
-		layer.off(L.FeatureGroup.EVENTS, this._propagateEvent, this);
+		if ('off' in layer) {
+			layer.off(L.FeatureGroup.EVENTS, this._propagateEvent, this);
+		}
 
 		L.LayerGroup.prototype.removeLayer.call(this, layer);
 
@@ -4740,7 +4711,7 @@ L.Path = L.Path.extend({
 	},
 
 	_fireMouseEvent: function (e) {
-		if (!this.hasEventListeners(e.type)) { return; }
+		if (!this._map || !this.hasEventListeners(e.type)) { return; }
 
 		var map = this._map,
 		    containerPoint = map.mouseEventToContainerPoint(e),
@@ -5072,35 +5043,10 @@ L.Path = (L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? L.Path :
 		return this;
 	},
 
-	onAdd: function (map) {
-		this._map = map;
-
-		if (!this._container) {
-			this._initElements();
-			this._initEvents();
-		}
-
-		this.projectLatlngs();
-		this._updatePath();
-
-		if (this._container) {
-			this._map._pathRoot.appendChild(this._container);
-		}
-
-		this.fire('add');
-
-		map.on({
-			'viewreset': this.projectLatlngs,
-			'moveend': this._updatePath,
-			'canvasredraw': this._updatePath
-		}, this);
-	},
-
 	onRemove: function (map) {
 		map
 		    .off('viewreset', this.projectLatlngs, this)
-		    .off('moveend', this._updatePath, this)
-		    .off('canvasredraw', this._updatePath, this);
+		    .off('moveend', this._updatePath, this);
 
 		if (this.options.clickable) {
 			this._map.off('click', this._onClick, this);
@@ -5115,13 +5061,13 @@ L.Path = (L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? L.Path :
 
 	_requestUpdate: function () {
 		if (this._map && !L.Path._updateRequest) {
-			L.Path._updateRequest = L.Util.requestAnimFrame(this._fireCanvasRedraw, this._map);
+			L.Path._updateRequest = L.Util.requestAnimFrame(this._fireMapMoveEnd, this._map);
 		}
 	},
 
-	_fireCanvasRedraw: function () {
+	_fireMapMoveEnd: function () {
 		L.Path._updateRequest = null;
-		this.fire('canvasredraw');
+		this.fire('moveend');
 	},
 
 	_initElements: function () {
@@ -5132,12 +5078,6 @@ L.Path = (L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? L.Path :
 	_updateStyle: function () {
 		var options = this.options;
 
-        	if (options.dashArray) {
-            		var da = typeof(options.dashArray) === "string" ? options.dashArray.split(",").map(function(el,ix,ar) { return parseInt(el); }) : options.dashArray;
-            		this._ctx.setLineDash(da);
-        	} else {
-	        	this._ctx.setLineDash([]);
-        	}
 		if (options.stroke) {
 			this._ctx.lineWidth = options.weight;
 			this._ctx.strokeStyle = options.color;
@@ -5145,18 +5085,18 @@ L.Path = (L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? L.Path :
 		if (options.fill) {
 			this._ctx.fillStyle = options.fillColor || options.color;
 		}
+
+		if (options.lineCap) {
+			this._ctx.lineCap = options.lineCap;
+		}
+		if (options.lineJoin) {
+			this._ctx.lineJoin = options.lineJoin;
+		}
 	},
 
 	_drawPath: function () {
 		var i, j, len, len2, point, drawMethod;
-		
-        	if (this.options.dashArray) {
-            		var da = typeof(this.options.dashArray) === "string" ? this.options.dashArray.split(",").map(function(el,ix,ar) { return parseInt(el); }) : this.options.dashArray;
-            		this._ctx.setLineDash(da);
-        	} else {
-			this._ctx.setLineDash([]);
-        	}
-        	
+
 		this._ctx.beginPath();
 
 		for (i = 0, len = this._parts.length; i < len; i++) {
@@ -5183,19 +5123,13 @@ L.Path = (L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? L.Path :
 		var ctx = this._ctx,
 		    options = this.options;
 
-        	if (options.dashArray) {
-            		var da = typeof(options.dashArray) === "string" ? options.dashArray.split(",").map(function(el,ix,ar) { return parseInt(el); }) : options.dashArray;
-            		ctx.setLineDash(da);
-        	} else {
-	        	ctx.setLineDash([]);
-        	}
 		this._drawPath();
 		ctx.save();
 		this._updateStyle();
 
 		if (options.fill) {
 			ctx.globalAlpha = options.fillOpacity;
-			ctx.fill();
+			ctx.fill(options.fillRule || 'evenodd');
 		}
 
 		if (options.stroke) {
@@ -5210,15 +5144,14 @@ L.Path = (L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? L.Path :
 
 	_initEvents: function () {
 		if (this.options.clickable) {
-			// TODO dblclick
 			this._map.on('mousemove', this._onMouseMove, this);
-			this._map.on('click', this._onClick, this);
+			this._map.on('click dblclick contextmenu', this._fireMouseEvent, this);
 		}
 	},
 
-	_onClick: function (e) {
+	_fireMouseEvent: function (e) {
 		if (this._containsPoint(e.layerPoint)) {
-			this.fire('click', e);
+			this.fire(e.type, e);
 		}
 	},
 
@@ -5260,7 +5193,6 @@ L.Map.include((L.Path.SVG && !window.L_PREFER_CANVAS) || !L.Browser.canvas ? {}
 				this.on('zoomend', this._endPathZoom);
 			}
 			this.on('moveend', this._updateCanvasViewport);
-			this.on('canvasredraw', this._updateCanvasViewport);
 			this._updateCanvasViewport();
 		}
 	},
@@ -6117,12 +6049,6 @@ L.Polygon.include(!L.Path.CANVAS ? {} : {
 
 L.Circle.include(!L.Path.CANVAS ? {} : {
 	_drawPath: function () {
-		if (this.options.dashArray) {
-            		var da = typeof(this.options.dashArray) === "string" ? this.options.dashArray.split(",").map(function(el,ix,ar) { return parseInt(el); }) : this.options.dashArray;
-            		this._ctx.setLineDash(da);
-        	} else {
-			this._ctx.setLineDash([]);
-        	}
 		var p = this._point;
 		this._ctx.beginPath();
 		this._ctx.arc(p.x, p.y, this._radius, 0, Math.PI * 2, false);
@@ -7243,8 +7169,9 @@ L.extend(L.DomEvent, {
 		    pointers = this._pointers;
 
 		var cb = function (e) {
-
-			L.DomEvent.preventDefault(e);
+			if (e.pointerType !== 'mouse' && e.pointerType !== e.MSPOINTER_TYPE_MOUSE) {
+				L.DomEvent.preventDefault(e);
+			}
 
 			var alreadyInArray = false;
 			for (var i = 0; i < pointers.length; i++) {
@@ -8324,7 +8251,7 @@ L.Control.Scale = L.Control.extend({
 	_update: function () {
 		var bounds = this._map.getBounds(),
 		    centerLat = bounds.getCenter().lat,
-		    halfWorldMeters = 6367000.0 * Math.PI * Math.cos(centerLat * Math.PI / 180),
+		    halfWorldMeters = 6378137 * Math.PI * Math.cos(centerLat * Math.PI / 180),
 		    dist = halfWorldMeters * (bounds.getNorthEast().lng - bounds.getSouthWest().lng) / 180,
 
 		    size = this._map.getSize(),
@@ -9003,20 +8930,25 @@ L.Map.include(!L.DomUtil.TRANSITION ? {} : {
 				delta: delta,
 				backwards: backwards
 			});
+			// horrible hack to work around a Chrome bug https://github.com/Leaflet/Leaflet/issues/3689
+			setTimeout(L.bind(this._onZoomTransitionEnd, this), 250);
 		}, this);
 	},
 
 	_onZoomTransitionEnd: function () {
+		if (!this._animatingZoom) { return; }
 
 		this._animatingZoom = false;
 
 		L.DomUtil.removeClass(this._mapPane, 'leaflet-zoom-anim');
 
-		this._resetView(this._animateToCenter, this._animateToZoom, true, true);
+		L.Util.requestAnimFrame(function () {
+			this._resetView(this._animateToCenter, this._animateToZoom, true, true);
 
-		if (L.Draggable) {
-			L.Draggable._disabled = false;
-		}
+			if (L.Draggable) {
+				L.Draggable._disabled = false;
+			}
+		}, this);
 	}
 });
 
@@ -9052,6 +8984,11 @@ L.TileLayer.include({
 		// force reflow
 		L.Util.falseFn(bg.offsetWidth);
 
+		var zoom = this._map.getZoom();
+		if (zoom > this.options.maxZoom || zoom < this.options.minZoom) {
+			this._clearBgBuffer();
+		}
+
 		this._animating = false;
 	},
 
@@ -9228,4 +9165,4 @@ L.Map.include({
 });
 
 
-}(window, document));
+}(window, document));
\ No newline at end of file
diff --git a/external/leaflet.css b/external/leaflet.css
index 92dd6ba8..dea175f0 100644
--- a/external/leaflet.css
+++ b/external/leaflet.css
@@ -21,6 +21,7 @@
 .leaflet-container {
 	overflow: hidden;
 	-ms-touch-action: none;
+	touch-action: none;
 	}
 .leaflet-tile,
 .leaflet-marker-icon,
@@ -278,12 +279,12 @@
 	border-radius: 5px;
 	}
 .leaflet-control-layers-toggle {
-	background-image: url(@@INCLUDEIMAGE:images/layers.png@@);
+	background-image: url(images/layers.png);
 	width: 36px;
 	height: 36px;
 	}
 .leaflet-retina .leaflet-control-layers-toggle {
-	background-image: url(@@INCLUDEIMAGE:images/layers-2x.png@@);
+	background-image: url(images/layers-2x.png);
 	background-size: 26px 26px;
 	}
 .leaflet-touch .leaflet-control-layers-toggle {