Adjust AntoxFriend due to changes in jToxcore

Also slightly change the way Antox should be built locally.
This adds a link to the current "reference" build of jToxcore to
README.md. The dependencies should be downloaded from that build and
copied to the respective directories before building.

While this adds isTyping() functionality to the AntoxFriend class, it
does NOT implement any callbacks or complete functionality for Typing
notifications in Antox. These need to be implemented by the Antox team
Added version information to about activity and corrected head comment
add another item to menu instead of changing add friend icon
Merge branch 'master' of https://github.com/Astonex/Antox
Merge branch 'sonOfRa-typing-notifications'
Merge branch 'master' of https://github.com/sudden6/Antox into sudden6-master
Merge branch 'sudden6-master'
Merge branch 'master' of https://github.com/dethstar/Antox into dethstar-master
Merge branch 'dethstar-master'
Update README.md

Devices alphabetically sorted
Italian translation: update

Sync'ed with b646aae614a87bdb6377c28176736c318f79cf9c
fixed manifest to avoid crashing when going back in activity bar
fixed #227
Merge branch 'Ansa89-patch-1'
Merge branch 'patch-2' of https://github.com/Ansa89/Antox into Ansa89-patch-2
Merge branch 'Ansa89-patch-2'
Merge branch 'master' of https://github.com/eroncanc/Antox into eroncanc-master
Merge branch 'eroncanc-master'