cached $bind results (fixed issue #1349)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6549 f16182fa-f095-11de-8f43-4547254af6c6
documented changes (to complete if you find something is missing)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6550 f16182fa-f095-11de-8f43-4547254af6c6