adding .gitignore for TAGS file
another update to gitignore
updated font-awesome from 4.1.0 to 4.2.0; changed color scheme to reflect cals official branding colors (http://brand.berkeley.edu/colors/); added shortcut icon (view in title bar at top of browser); added actions to learnmore buttons to show more detailed information; added how it works section; updated footer with correct information
merger with master; Updated to reflect new why us section; Updated master colors and icons;
updated text in a few places; addded call to action pane with image; added fake loading spinner to signup
added text to the learn more tabs
one last commit before handling conflicts with master