Add levelshot detail image from Turtle Arena
Shader clean up

Remove Turtle Arena-specific shaders.
Use simple blendfunc names.
Use ET's implicitBlend to simplify some shaders.
Add cull none to more shaders.
Remove blendfunc from projectionShadow.
Reorder some keywords.
Use 'cull none' instead of 'cull disable' (does the same thing).
Make white shader work correct on 3D models and world too
Add more to readme
Remap missing crosshairs to existing ones
Add rocket model from Turtle Arena
Remove fonts/*.tff from COPYRIGHTS.txt (they're not in this repo)
Add player spawn / teleport models

Add model containing an uncapped cylinder with teleportEffect shader.

models/misc/telep.md3 is used by baseq3.
models/powerups/pop.md3 is used by missionpack (drawn 40 units higher in-game, so I shifted it down 40 units).

The texture was already added.

Based on Turtle Arena's telep.md3 (which uses missionpack offset and different shader name).
Add bitmap fonts using M+Fonts

Generated using using Freetype2 via modified Spearmint TTF rendering.
Add some weapon effects from Turtle Arena
Minor bullet explosion changes

Made bullet2/3 smaller and added dark stops in the center of bullet1/2/3.
Increased animation speed in shader.
Made missing weapon explosions reuse others