minor

git-svn-id: http://haxe.googlecode.com/svn/trunk@6041 f16182fa-f095-11de-8f43-4547254af6c6
fixed exists return type

git-svn-id: http://haxe.googlecode.com/svn/trunk@6042 f16182fa-f095-11de-8f43-4547254af6c6
initial ObjectMap

git-svn-id: http://haxe.googlecode.com/svn/trunk@6043 f16182fa-f095-11de-8f43-4547254af6c6
Visit abstract implementation types too

git-svn-id: http://haxe.googlecode.com/svn/trunk@6044 f16182fa-f095-11de-8f43-4547254af6c6
Initial implmentation

git-svn-id: http://haxe.googlecode.com/svn/trunk@6045 f16182fa-f095-11de-8f43-4547254af6c6