* Requirement set to 0 until there's a structure in the order
we want challenges to be completed.
* Times based on a few rounds without cheating[1]
[1]: You can cheat in Black Mansion by just going straight ahead
in the hill after the start.
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@11372 178a84e3-b1eb-0310-8ba1-8eac791a3b58