Fix #1231 - stk-code/data not found on windows (secondary report).
Use instancing to expand shadows instead of GS
Remove an extra EndQuery
Make use of gl_amd_vertex_shader_layer when available
Cast some char to unsigned char
Add basic support to display GPU markers in the profiler
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Remove debug arount scoped timer.
Factorize godray visibility test in its own function.
Simplify some code and have a function that render a scene from a cam pov
Fix segfault on Linux/Mesa
For some reason, glGetString(GL_EXTENSIONS) is failing. This will need more investigation
Merge branch 'master' of https://github.com/supertuxkart/stk-code into random-gp
preparing tracks_screen by adding a randon GP icon