Upgraded Font Awesome and introduced new file list
Forgot to add slimscroll jquery plugin
Also forgot to add md5 js lib
Changed file search a bit (instant search) and made scroll bar adjust directly when file list changes
Only interpret stand alone T{n} as a tool change command

Compare https://groups.google.com/forum/#!topic/octoprint/X8t1btetMmg
Removed accidentally committed logging message
Added automatic migration of old event subscription format to the new one
Static endpoint in tornado for fetching the current webcam snaphot (authenticated users/apikey only)
GCODE viewer now interprets inverted axes for printer control and mirrors print bed accordingly.

Should enable people to set their axes origin so that the viewer matches what they see on their printer.

Should close #431
Merge remote-tracking branch 'upstream/devel' into devel