varray_* rewritten to remove padding (varray_vertex3f, varray_texcoord2f, varray_texc...

varray_* rewritten to remove padding (varray_vertex3f, varray_texcoord2f, varray_texcoord3f, varray_color4f now exist), this required changes to a huge amount of code (but netted a 30% speed gain typically)
fixed some various bugs
added voodoo1/2 support in realtime lighting engine (well, except for the fact it still requires stencil, which voodoo1/2 don't have, this will be addressed later when world lights and dlights are independently controlled)
changed lightning beams a bit (they're now white) and due to a request I added support for r_lightningbeam_qmbtexture (loads textures/particles/lightning.pcx and knows approximately how to use it, I recommend changing r_lightningbeam_repeatdistance to make it look right)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@2842 d7cf8633-e32d-0410-b094-e92efae38249