Added Instructor.PhotoThumb
Implemented PhotoThumb to add PDS to gantt bar
Added better hover/explain placement flexibility
Housekeeping
IE border CSS fixes
Formatting
Hide tabs when there are now students on modal (for now)
In progress, do something with modal buttons
Fixed explain boxes going off screen on wide modal
part of hide tabs commit
Removed junk code
Allowed calendar day click to change start date

This just seems a bit more intuitive/simpler than dragging the course
around.  Now users can set the start date the same for creating or
editing a class.
Changed to only 3 days out vs 4 on modal calendar
Added (inactive) button for seats open count on hover

todo, need to wire up the code somehow within this ng-bind-html to
handle the click event.  There is also a single/double-click conflict
when on the same element.
Added more user instructions/details