REV: Add due date to a card
Swap jQuery timepicker for jQuery-ui timepicker
Prevent due date from being set in the past. Allow user to remove due date. Other bug fixes.
Fix JSLint error
Revert: Display 12:00 AM instead of 00:00 AM
Bugfix: prevent user from being able to select a time in the past when within the 10 minute step
Merge pull request #18 from smilledge/feature/card-due-date

[REV] Add due date to a card