Added simple script that makes all challenges trivial
(0 laps, no time or energy limit).
Merge remote-tracking branch 'upstream/master'
Test commit.
Fixed format for TODO file.
More testing.
Add a way to display shadow map.
Reverse shadowmap views.
Add wireframe frustrum view.
Fix build
Fix shadowdebug not using right viewfrustrum
Merge branch 'master' into shadowdebug
Change xml style of screens and fix some issues with screens
Merge pull request #1371 from Flakebi/master

Change xml style of screens and fix some issues with screens
Fixed display or kart name in top left corner (caused by calling
add on the label widget twice).
Merge branch 'master' of github.com:supertuxkart/stk-code
Removed unused variables.
Factorize transparent mesh rendering.
Remove code never executed.
Use a precomputed invmatrix in gi.frag

(General) matrix inversion is costly, it's better if it's done a single
time on cpu. Improve performance.
Merge branch 'master' of github.com:supertuxkart/stk-code