clean src/karts from cout, printf and cerr
clean src/modes from printf/cout/cerr
clean src/items
clean src/io
clean src/addons
small fix: mismatching allocation/deallocation
Merge pull request #36 from KroArtem/master

Clean src/modes and src/karts from old logging code
Shaders: Remove some unused shaders.
fixing some memleaks
copy-paste error
add assert in case ftell fails
fix typo
fix coverity issues
Merge remote-tracking branch 'upstream/master'
Shadow: reenable shadows

It's just plain basic shadowmaps, a lot of tweak is still necessary but
it gives a way to see how light values are affected in some places.
(cave in chocolate for instance)
Shadow: Better bias.
Shadow: soften edge a little
Shadow: Fix broken specular with shadows enabled.
Lights: Remove unused export value.
Shadow: Support for alpha tested meshes.