MD2 & Patch drawing fixes

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.
MD2's replacing skinned mobj fix

MD2's that replace mobjs that have a skin, but the skin doesn't have an
MD2 now display.
Software Cropped Patches

Fixed the stupid error I made that was causing software to not draw
cropped patches.
OpenGL Skybox

OpenGL skyboxes.
Slight change to sky vertical offsetting.
Opaque translucent midtextures

Fixed translucent midtextures being opaque when there were multiple
lights in a sector.
Merge pull request #1 from Sryder13/master

OpenGL Fixup
Warning gone.

Hopefully.
Merge https://github.com/Sryder13/SRB2
SRB2 2.1.4 release
SRB2 2.1.4 release
bump SRB2Mac version
OpenGL Intermission picture fix

Fixes intermission pictures being taken in OpenGL.
change version number to 2.1.4, add linux64 info

Huge thanks to Alam_Squeeze from #srb2fun. :D
Merge pull request #2 from ToBeFree/patch-1

change version number to 2.1.4, add linux64 info
Hopefully correct

Pulled
Post processor skybox

Post processing no longer done in the skybox.
OpenGL remove HOMs

Removes HOMs from OpenGL.
This also seems to have made skyboxes not draw ontop of everything else
on Intel GPU's.
Quartz is evil, we need to ask for a new modeList
Fixup Srb2Mac to exclude srb2.srb from Lite pack
OpenGL Flashpal Flashes

Fixed flashes for OpenGL Nukes/Teleports etc.