fixed Map documentation

git-svn-id: http://haxe.googlecode.com/svn/trunk@6678 f16182fa-f095-11de-8f43-4547254af6c6
documentation fixes

git-svn-id: http://haxe.googlecode.com/svn/trunk@6679 f16182fa-f095-11de-8f43-4547254af6c6