Add support to escape dots (.) by using double dots (..) for aura keys. Fixes #2945 (I think)

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@16010 3db68df2-c116-0410-a063-a993310a9797
various small tunings for petra

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@16011 3db68df2-c116-0410-a063-a993310a9797
Merge 'remotes/trunk'