- removed unused /non valid LESS theme folder : normally fixes #110
- modified and compiled (bare bones functionality) the older bootswtach themes:
 * re enabled theme switching
- updated font awesome files
- modified code editor icon
- worked towards #93 : fixing the thumbnail system:
 * thumbnail loading implemented and (mostly) working for dropbox store
 * updated dropbox.js files to latest for arrayBuffer readFile support
 * added options hash for _readFile in backbone.dropbox
 * updated projectBrowseView
 * added correctly resized thumbnail generation in visualEditor helpers