* Completely redid how splitscreen works, with eventual support for quads. Squish per-player stuff automatically into the right places! Works in GL, associated flag kills V_SPLITSCREEN.
* Seriously update the lives-drawing function for all gametypes, with strings that replace the lives number whenever it's missing (deprecates SKINNAMEPADDING).
* Improved how the nosshack works, alongside many other refactorings.
* Update all the other V_DrawCroppedPatch calls to match the new behaviour.
* Fix the OGL version of V_DrawCroppedPatch to match the new behaviour.
(To justify my changes: It's not exposed to Lua, and the function signature was a mess. This way it's easier to mentally map how it would work.)
MD2's can be translucent again.
MD2's can use sprites instead of another random texture if they have no
texture.
Patches are drawn in the correct place on non aspect correct
resolutions.
Cropped Patches are drawn.
