Replaced matrix related FFP code with explicit matrix calculations.
The modelview matrices now get uploaded at a single point via glLoadMatrix4
rather than using the GL1 matrix stack.
In the GL2 variant this will become a uniform upload.
[patterns]
**.h = native
**.c = native
**.cpp = native
**.lua = native
**.txt = native
**.pas = native
**.inc = native
**.hs = native