Face-rec: trim cache
Docs: updated requirements and use cases
Android: renamed login activity and updated manifest
Android: display home page after login to facilitate notifications
Android: added icons to menu
Android: fixed remote auth problem
Android: improved layout of login form
Android: added throbber to login form
Android: update "take attendance" hint
Face-rec: Upload all pictures in one go
Face-rec: Delayed uploading of pictures
Android: implemented removal of faces from list
Android: delayed removal of throbber
Face-rec: implemented batch recognition and confidence levels