Some initial groupchat lossy packet code.
Added functions to relay lossy group chat packets.
Added some functions to send and handle lossy packets.
Added more group functions to eventually have working A/V.
Some function changes for better A/V integration to group chats.
First commit of actual A/V code for group chats.
Remove dead store
Remove unused variable
Group audio starting to take shape.

Some issues still left to solve.
Basic audio packet parsing code.
Group chats now have types.
Group audio might work now but I have not tested anything yet.
Fixed irc syncbot.
Audio group chats still have some small issues.
Prevent connection ips from switching on LAN.
Fixed some audio group chat issues.
Fixed bug.
Merge branch 'master' of https://github.com/tux3/toxcore
Added comments.
Merge branch 'master' into debian/unstable