BS Compatibility: Modals & DropDowns Closing

This change prevents the DateTimePicker from closing Bootstrap (and other) modals, pop-ups, and drop downs on the selection of the date, by stopping propagation of the click.
Changing the DateTimePicker to close on the selection of a datetime, restores the previous behaviour.
Merge pull request #85 from neiljohnston/patch-1

BS Compatibility: Modals & DropDowns Closing