Finished impl of ClassicWorld file format (needs further testing).
Fixed footstep sounds.
Chaning hack types no longer turns one off (fix).
Added chat scaling.
More/less chat lines will show based on scaling.
Fixed an issue with movement and chanign GUI screens.
"Cant connect" issues will now always visit the ErrorScreen (old mc bug).
Client can no longer be pushed with noclip on

Signed-off-by: Jonty800 <Jonty800@gmail.com>