Fixed minor memory leak.
Merge branch 'master' of github.com:supertuxkart/stk-code
Fixed memory leak.
Fixed memory leak.
Revert "Try to fix ibl precision issue"

This reverts commit 1cf592394bdf2e31996a8bc9aeb1da189455447b.
Fixed memory leaks.
Merge branch 'master' of github.com:supertuxkart/stk-code
Clean up sunlight shader + factorize diffusebrdf
Remove redondant uniform in IBL
Move FS template declaration in shaders.hpp
Factorise SH coefficient in an UBO
Remove extra uniforms in IBL shader
Use deferred shading instead of light prepass
Implement DFG LUT for phong specular
Use GGX D + Schlick G for BSDF and burley for Diffuse
tweak tonemap
Retweak tonemap
Clamp specularIBL