ltoxav: updated to reflect API changes -- untested
ltoxcore: fixed add_friend, added add_friend_string to take address as a readable string
tests: tox: fixes
ltoxcore: alias getFriendConnectionStatus to isOnline
ltoxav: improved, fixed, updated to reflect last API changes
tests: tox: updated to latest toxcore's test
lua_common: set must not pop the value from the stack
ltoxav: pass userdata (as a raw lua string)
ltox: pass userdata to callbacks, updated test
added toxcore and libsodium as submodules
Makefile: statically include toxcore and libsodium by default or use pkg-config for dynamic lib