MODIFIED: sent flag

The flag now will record more states that messages can be sent or retrieved as. This is to help if a message is received and fails to decrypt the user will know even if they do not look on their screen right away.
ADDED: inicator for failed decryption.

Images are not really that great and are more just for testing. They also still need to be move so they are not over top the date.
Merge branch 'master' of github.com:tinfoilhat/tinfoil-sms