Merge CGame and UI virtual machines

[zturtleman]

http://ztm.x10host.com/2013/03/18/why-is-there-a-ui-vm/

Merging cgame and ui will make things better, only negatives I can think of are (possibly?) take longer to load main menu and UI/cgame VM can't be replaced separately.

I created a patch for merging ui into cgame awhile ago, but didn't get Team Arena working. code/ui/ui_shared.c doesn't support loading hud and menus at the same time. :/

[zturtleman]

Edit: disregard this entire message.

Hmm, I should probably decide if I'm going to support Team Arena UI or just replace with new UI see #48. If not supporting TA UI, this is fairly easy. :/

Also I wonder if I should rename cgame after merging ui into it. uxgame.qvm?... probably not. seems like it might make it easier to handling connecting cgame and ui if I had some other name for the connecting part (UX) though..

[zturtleman]

Merged ui into cgame in a3edb6e. Both Q3A UI and Team Arena UI work.

There is still improvements to make (reduce duplicate code, get rid of BG_RegisterClientCvars, etc), but they're merged and working so closing issue.