TTT: Converted usermessages to net messages.

For some things it just made sense, like the corpse data we can half the data sent and traitor voice state can be sent much faster in 7 bits and a boolean bit. For all the GUI interfaces too since umsgs are queued whilst net messages are instantaneous.

Also removed cl_init.lua.orig of the C4 since it's been there for over a year, don't really think a reference is required anymore. :v