Skidding achievement
Wrong include corrected (\ -> /).
Drift counting fixed.
Tab fix
Bring back minimap.
Start working on instancing library node
Add initial basic support for loading instancing nodes
Merge branch 'master' into Instancing
Merge instanced_object_pass vertex shaders.
Clean code to make it extendable later
Some fixes.
Cleanup for instancing
Merge branch 'Instancing' of https://github.com/supertuxkart/stk-code into Instancing
Add Grass material support for instancing.
Fixes for grass instancied material.
Add orientation to grass material
getWind() changes.
Look like instance orientation was wrong.
Explicitly build the inverse matrix

Some drivers does not support inverse function although they advertise
glsl 140 support, and it's faster  to do it manually as we know the
structure of the matrix.
Properly clean GL buffers in instancing node.
Move the wind portion into the world matrix

It should make the normal correct although I didnt notice any visual difference.