Added ability to empty the trash
Merge branch 'add-delete-trash' into develop

* add-delete-trash:
  Added ability to empty the trash
Added method to get unread inbox count of messageable. Fixes #24
Added Gitter account info to README
Merge branch 'develop'

* develop:
  Added Gitter account info to README
  Added method to get unread inbox count of messageable. Fixes #24
  Added ability to empty the trash