Another attempt to fix configuration for multiple Urho3D libs found.
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Add Zone height fog support, HeightFog shader option and techniques.
Add GammaCorrection and AutoExposure post processing shaders.
Add near & far clip PS uniforms.
Add 3d texture support and (3d LUT based) ColorCorrection post processing shader.
Add HDR renderpath support, BloomHDR, Blur and Tonemap post processing shaders.
Travis CI: API documentation update at 2014-01-27 06:40:45 UTC.
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Merge remote-tracking branch 'upstream/master'
rm useless file