Clean up EndGameManager. Fixes #2130

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@14087 3db68df2-c116-0410-a063-a993310a9797
Merge 'remotes/trunk'
Ignore 'compiled' Python files
Merge branch 'master' of http://github.com/JoshuaJB/0ad into lobby