Fixed compiler warning.
Fix some warnings
Use an instance manager
xrandr: Simplify code a bit.

Fixed some memory leaks.
Read sampler from attributes.
Install icons in $PREFIX/share/icons/hicolor path.

Don't use static paths in .desktop file. Actually I don't know about any application which uses it :P
Fix attempt for crash.
Push empty InstanceData independently of gl level
Pack instanceData
Enable arb debug output on all non apple platform
Fix instancing without base instance support
Do not draw twice the second pass instanced mesh
Merge branch 'master' of github.com:supertuxkart/stk-code
Fixed typo.