Configuring project code style for JetBrains and other IDEs.

Adding EditorConfig support.

Updating .gitignore

.editorconfig

@@ -0,0 +1,16 @@
+# Specification available at: http://editorconfig.org
+
+# Root config file for IITC.
+root = true
+
+[*.{js,py}]
+charset = utf-8
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+
+# Following JS code style rules do not have EditorConfig support yet:
+# - Use identity operators (===) over equality operators (==).
+# - Opening brace at end of line. e.g. "if(a) {", "} else {", "} else if (b) }"
+# - No space between keyword and parentheses. "if(a)" not "if (a)"
+# - Use single-quotes for strings, and double-quotes within strings for HTML attribute values. $('<div id="#me">').