Alias model drawing derived from RMQEngine
fix world rendering on windows
Work around SDL failure to probide PFNGL... typedefs
Tidying r_alias
cleaning
fix fog in alias vert shader
Add some guards around new glsl aliasmodel code
add credits for borrowed code from RMQEngine
Whoops
don't mutate cached paliashdr_t, since we might have to reload it from disk
Remove dead code
update document dates

git-svn-id: svn+ssh://svn.code.sf.net/p/quakespasm/code/trunk@1123 af15c1b1-3010-417e-b628-4374ebc0bcbd
wip: backport vertex shader to arb assembly
get it working.
tear out glsl stuff
don't skip vbo check
allow disabling vp
tidy shader files
memory saving: store the normals in a signed char[4]
recompiled SDL2

git-svn-id: svn+ssh://svn.code.sf.net/p/quakespasm/code/trunk@1124 af15c1b1-3010-417e-b628-4374ebc0bcbd