scheduler-datepicker-combobox-changes: squashing for merge
 This is a combination of 6 commits.
scheduler-datepicker-combobox-changes: updates to scheduler, datepicker, checkbox, radio, and the unit tests

datepicker unit test updates

    scheduler-datepicker-combobox-changes: updating combobox

scheduler-datepicker-combobox-changes: grunting

scheduler-datepicker-combobox-changes: placard - added enable / disable methods, with unit tests. grunted.

scheduler-datepicker-combobox-changes: removed data-initialize="datepicker" from scheduler unit test markup
Merge pull request #601 from ExactTarget/scheduler-datepicker-combobox-changes

Scheduler datepicker combobox changes