Implement saving of map XML.
Implement saving of map XML.

Also, death to xml.dom.minidom! Bring on ElementTree!



git-svn-id: 5665c17dde288ce6190d85f4a2d6486351776710@305 f663ce52-ac46-0410-b8de-c1c220b0eb76

eevee/cocos2d-mirror