Added first script to find unused files in STK.
Renamed XMLWriter to UTFWriter (which is the correcter name).
Added new player manager, and started to replace the saved data
from user_config with player manager.
Fixed linux compilation.
Removed m_all_players from UserConfigParams (though there are stil
bugs in the new code).
Merge branch 'new_login' of github.com:hiker/stk-code into new_login
fixing some memleaks
copy-paste error
add assert in case ftell fails
fix typo
Started to move current player info from unlock manager into
player_manager.
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.
Various compilation fixes, some cosmetic changes.
Shadow: Support for alpha tested meshes.