Support conditional expressions in shader effect XML files.
Consolidate fixed-function model rendering into the shader system.
Remove lots of now-obsolete renderer code.
Move shader defines from std::map to new class with interned data, for
performance.
Move texture from model into material.
Alleviate singletonitis.
Remove obsolete lodbias setting.
Remove unused terrain shadow transparency.
This was SVN commit r11423.
Support emitters that are fully running as soon as the game starts.
Fix particle clumping when moving from off-screen to on-screen, by
computing updates more incrementally.
Fix overzealous culling of models with particle emitters.
Add particles to renderer stats.
This was SVN commit r9345.
