added Iterable/Array top-down type inference (fixed issue #1650)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6445 f16182fa-f095-11de-8f43-4547254af6c6
added Reflect specification (part 1)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6446 f16182fa-f095-11de-8f43-4547254af6c6