support for abstract type parameters (fixed issue #1400)

git-svn-id: http://haxe.googlecode.com/svn/trunk@5912 f16182fa-f095-11de-8f43-4547254af6c6
added haxe.Vector

git-svn-id: http://haxe.googlecode.com/svn/trunk@5913 f16182fa-f095-11de-8f43-4547254af6c6