Use font-awesome icons
Add icon for late displays
Clean up unused empty javascript files

We don't really have much controller specific javascript and keeping loads of empty useless files is just silly..
Move group_links scroll logic to more sensible place

We previously had the group_links animated scroll to given anchor in slides.js, now it stands on its own in group_links.js.coffee and is also converted to coffeescript
Moved all display warning update logic to it's own file
Add ids to navigation tabs for controllers

We will be using them to highlight tabs needing attention
BUGFIX: : masquerading as ;
Style tabs with warnings

We use the font-awesome warning icon and warning background on tabs with active warnings