0.5.13.0
Version 0.5.13.0 .

svn merge -r 23342:23474 https://dart.googlecode.com/svn/branches/bleeding_edge trunk
svn merge -c 23501 https://dart.googlecode.com/svn/branches/bleeding_edge trunk

git-svn-id: http://dart.googlecode.com/svn/trunk@23503 260f80e4-7a28-3924-810f-c04153c831b5