Factorise SH coefficient in an UBO
Remove extra uniforms in IBL shader
Fix memory leak.
Added support for wip-tracks and wip-karts directories, which are only
used when artist debug mode is enabled.
Missing patch in previous commit.
Give the first player tux as icon (instead of sara). Fixes #1771 for now.
Fixed incorrect icon name.
FreeBSD build fixes.

Irrlicht change also submitted upstream https://sourceforge.net/p/irrlicht/patches/300/.