remove m_random_gp
fix #1395
running whitespace.py
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Factorize a function and add proper doxy comment.
Remove rimlight material
Factorize and comment generateCubemapFromTextures
Merge pull request #1401 from konstin/master

running whitespace.py
Fix crash when disabling GLSL
Fix overworld minimap
Factorize some rendering loops.
Try to factorize using tuple
Use variadic recursion to expand tuples

It's quite non trivial to do but it should save a lot of typing later.
Factorize spheremap too.
Factorize Unlit material
Factorize detail mat too
Fix linux compilation
Factorize transparent materials too
Use const ref in recursive variadic template unroll_arg<>::exec
Factorize all first pass materials.