Major revision

* Added card buttons for minimize, micro, and close
* Added tray where cards go when minimized
* Re-wrote Dragon Drop directive into Card Title Bar directive which
also handles card button dom and events
* Created new Card class and constructor in CardServices
* Changed CardServices to work off of obj hash instead of array. Now
each loaded card has an id
* Implemented new flex box rendering
* Conformed Editor window to use new title bar directive
* Added new minimized filter for cards