Enable simple culling for non indirect codepath
Try to disable openMP at runtime
Some fixes to ligthshaft
Try to merge all MeshFor_Pass
Fixed mingw compilation
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Select 'start' as default in gp info screen.
Merge remote-tracking branch 'origin/master-fix'
Merge branch 'master' of github.com:supertuxkart/stk-code
Use a parallel loop for IA

It sighltly helps decreasing stuttering in some area of chocolate.
Remove unneeded functions
Try to put IA in its own thread
Revert "Try to put IA in its own thread"

This reverts commit 2a60a841556a9a6cdd3a259bebd44e95365f8f64.
Reenable billboards
Revert "Use a parallel loop for IA"

This reverts commit 8e333afa99cddf0a4092b780812baee42276d8ab.
Do not set glewExperimental outside of linux
Some improvements to the GP editor:
    - GP are now classified into groups, just like tracks: standard, user defined, and add-ons
    - allow empty GPs to be loaded by the GP manager, so that they can appear
      on the GP editor (but not on the track selection screen)
    - enable/disable buttons depending on the available options
    - provide some feedback after pushing the "save" button
    - some minor bug corrections and improvements
Drop support for GL 3.1  on windows

Fixed pipeline will be used instead
Add a dtor to animated mesh
Use __linux__  macro