[SP] Removed some leftover OpenAL stuff from Linux/Mac builds.
[MP] Removed some leftover OpenAL stuff from Linux/Mac builds.
[SP] CParticleCloud only used GL_POINTS on XBox.
[MP] CWeatherParticleCloud only used GL_POINTS on XBox.
[SP] stdinIsATTY was not initialized in sys_unix.cpp.
[MP] stdinIsATTY was not initialized in sys_unix.cpp.
Merge pull request #524 from BSzili/master

Minor cleanup in the client, removed some dead code from the renderer.