Fixed file extension.
Fix issue #1108
Merge pull request #1684 from Alayan-stk/patch-1

Fix issue #1108
Fixed #1680 (notification shown at wrong place after changing resolution).
Merge branch 'master' of github.com:supertuxkart/stk-code
Added some asserts to narrow down #1685.
Fixed #1687 (time too long when using many karts in ftl)>
Fixed compilation.
Apply patch from upstream irrlicht which allow to compile it on windows using clang.
Disabled warning messages if the automatically created disabled
textures are not in the texture cache.
Merge branch 'master' of github.com:supertuxkart/stk-code
Fixed mingw compilation in release mode.
Merge branch 'master' of https://github.com/supertuxkart/stk-code
Use variable sigma for blur filter
Initial shader implementation
Fixes
Looks a lot better
Fix clamp
Some tweaks
Try fullscreen fog