filenames to 'License.txt', to be in synch with what is used elsewhere. git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@5993 178a84e3-b1eb-0310-8ba1-8eac791a3b58
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/branches/irrlicht@4281 178a84e3-b1eb-0310-8ba1-8eac791a3b58