Increase shadow filtering
Fix bug in feature unlocked screen, improve error message
Fixed compilation in release mode.
bugfix: auto-calculate tangents for static-mesh too
Display bounding boxes
Remove quick culling

Sometimes it returns wrong results
CURRENT can not be defined as result of or-ing the values, since the
values are not bit masks.
Merge branch 'master' of github.com:supertuxkart/stk-code
Merge branch 'master' of https://github.com/supertuxkart/stk-code into ScriptCache
Added basic caching for scripts