Got it to a stable status

Fixed a bug with friend address and the length.
Changed how the delegate accepts group invites/friend requests making
it easier for the requests view controller to handle tableview stuff.
Refactored Friends, Groups, and Messages

Friend and Group objects now hold their messages. Singleton only has to
worry about holding the friends and groups now, and not parallel arrays
of friends and messages. Next up: holding friend/group objects in
dictionaries instead of an array.
Update toxcore
updated toxcore to building version
bump messages controller
fixed wrong message origin
added size and position constraints on qrcode image. fixes #61