2) Reduced smoke effect somewhat (and made it dependent on actually turning
the wheel)
3) Removed skid marks when restarting a race.
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/trunk/supertuxkart@2576 178a84e3-b1eb-0310-8ba1-8eac791a3b58