Moved the message definitions into their own namespace.

Implemented the handlers / messages necessary to move a card to another board.
Implemented moving a card from one board to another along with specifying the list it belongs to.  Also added some cosmetic changes.
Refactored some of the menu code api so that it's easier to modify / add.
Added more menu items for modifying card details.
Fixed some bugs with gestures (i.e., Tap on members to add them to card)
Fixing a few references
Merge branch 'feature/card-to-board' into develop