Fixed custom weapons not hurting other players

Signed-off-by: Justin Wiblin <Justin_wiblin@hotmail.co.uk>
Xp is now synced and gui overlay updates, xp is not persistent atm though

Signed-off-by: Justin Wiblin <Justin_wiblin@hotmail.co.uk>
Merge pull request #5 from Thelonedevil/combat

Combat