made models more DRY, moved get_tweet to bb mixin
use the 'close' action provided by BB.ModalControllerMixin
Merge pull request #1297 from onepercentclub/feature/fix-modal

Use the 'close' action provided by BB.ModalControllerMixin
Merge pull request #1296 from onepercentclub/feature/BOOK-1009

made models more DRY, moved get_tweet to bb mixin
Make sure only accept can be clicked