Added a dateClick event for when a day is clicked on calender.
Merge pull request #698 from ExactTarget/datepicker-click-event

Added a dateClick event for when a day is clicked on calender.
fixing tab / space wonkiness in dev.html and index.html
datepicker-restricted-focus: fix for issue #613, where restricted dates were tabbable (and thus retained focus) due to all dates being buttons. grunting to keep css up to date
Merge pull request #699 from ExactTarget/datepicker-restricted-focus

Datepicker Restricted Focus
Improving code readability. 

May have uncovered a bug.

Proof that code is functionally equivalent (just more readable): http://jsbin.com/xumipa/1/edit?js,console


(I did this because I am not smart enough to understand the code as it was previously written with 100% confidence without actually running it)
aria labels clean up index.html
Tri-state checkbox, integrated with Tree control.
Tri-state checkbox, integrated with Tree control.