add custom phone number type
Always show the time of the received message.
move FLAG_SECURE to PassphraseRequiredMixin

Fixes #1402
// FREEBIE
Add Travis CI config.

//FREEBIE
Merge pull request #1614 from mcginty/contact-list-security

move FLAG_SECURE to PassphraseRequiredMixin
Merge branch 'master' of https://github.com/WhisperSystems/TextSecure into feature-1000

Conflicts:
	README.md
ACK the message before checking the content

=>	This means that messages that are corruptly received are still acked.

	However this will prevent bad MAC on resent (duplicate) messages and will prevent resending of messages with bad MAC
	Lastly will this prevent resending of messages that produce an exception on reading.

The proper way of handling the acknowledgement messages is an unknown. I asked on the mailing list for that.