Added support for "<" relations in graphical restrictions, fixed
compiler warnings.
Merge branch 'master' of github.com:supertuxkart/stk-code
Merge branch 'master' of github.com:supertuxkart/stk-code
Changed version number from 'svn' to 'git'.
Forget to update grass pass 2 sun location
Misc tweaks, mainly to include new island tracks in challenges and GPs, and other minor fixes
Work around #1780 (font corruption).
Do not allow fog start to be null
Try old method of creating a context
Fixed #1799 (linking issue) - use of VS only functions that were not
enclosed on #ifdef (not an issue with default link options, since the
functions using the VS only functions are not actually used in STK).
Merge branch 'master' of github.com:supertuxkart/stk-code
Update .gitignore file
Revert "No need to signal the shader the AMD_vertex_shader_layer is enabled"

This reverts commit 2e0bec57570c27a37630e98a721a79127ea6e7f5.
Do not undefine builtin macros.
Factorize fog
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
Clamp specularIBL