added offline tile management to FAQ

website/page/faq.php

@@ -175,6 +175,25 @@ Note:
 END
 ),
 
+'offline-map-tiles' => Array ( "IITC Mobile: Is it possible to prefetch map tiles to reduce data traffic?",
+<<<'END'
+In fact, you don't have to care about tile caching. On mobile networks, IITCm
+downloads tiles only if it's really needed. Tiles are updated only when
+connected to WiFi. If you still want to prefetch tiles, go on reading:
+<ul>
+<li>Prefetching does only work for providers which follow the OpenStreetMap tile folder structure (for example: Google or Bing tiles don't work)</li>
+<li>It is recommended to use the external storage for tile caching, so check it in IITCms settings. Otherwise, your storage is highly limited and you need root access</li>
+<li>A recommended tool for downloading tiles can be found <a href="http://wiki.openstreetmap.org/wiki/JTileDownloader">here</a></li>
+  <ul>
+  <li>A custom build including MapQuest tiles as default can be found <a href="http://iitcm.code-noobs.org/jTileDownloader-0-6-1-iitc.jar">here</a></li>
+  </ul>
+<li>The easiest way is choosing a Bounding Box (Lat/Lon) via the Slippy Map chooser</li>
+<li>On your smartphone, search for your providers tile directory. Mapquest should be in <home directory>/Android/data/com.cradle.iitc_mobile/tiles/mpcdn.com/1.0.0/map/</li>
+<li>Finally, copy the content of JTileDownloaders output folder to the appropriate directory on your smartphone</li>
+</ul>
+END
+),
+
 'debug-data-tiles' => Array ( "What do the colours mean in 'DEBUG Data Tiles'",
 <<<'END'
 The data from the Niantic server is download in square tiles. Sometimes requests fail. The colours show this status