Dweller 1.21.2

I'm happy to say that one of the two identified crash bugs have been found and solved. Along with said bugfix this version also contain improved logging that will help me find the cause of the second crash as well. Thank you to everyone who has sent me crash reports. Keep 'em coming!

#382 Fix crash when moving between levels

Source and comments: http://www.dwellergame.com/2012/08/dweller-1212.html