PhraseMates Translator & Chat

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- Added Chat with other PhraseMates users! You can chat with other users by tapping on their profile, then tapping on the chat button in blue or green (online).
- Added Chat button to action bar of Mates screen to allow users to view all their active chats and visit chat rooms.
- Improved user profiles. Tapping on a Mate now displays their PhraseMates profile including chat button and tabs to view their phrases.