Added client convar to generate new icons. They are much cleaner, colored, and fit the entire model on screen.

nak_rebuild_spawnicons

Added 5, 15, and 30 degree corner tubes.

Added medium tube and extra small tube.

Added road-to-tube jump track piece.
2 sets of LODs for each tube.
Boost tube reworked to work better with fat vehicles (large masses).
Mipmaps for every texture. (200% performance increase)
Proxy color list changed to sit in a "master list" so it can be applied to any track piece in the future.

The skins were reworked completely. Removed the black tube skin because you can get the same thing with a color tool and the solid skin.

Skin 1 - Performance texture
Skin 2 - Alphatest texture (can see through it)
Skin 3 - Solid texture (best performance)

added lods to the 90 degree corner tube
added lods to the materials as a test

boost tube
90 corner tube
45 corner tube
included materials
proxy color support
included track placer tool