moved Typeload.make_const to Optimizer.make_constant_expression

git-svn-id: http://haxe.googlecode.com/svn/trunk@5782 f16182fa-f095-11de-8f43-4547254af6c6
added Type.is_value_type

git-svn-id: http://haxe.googlecode.com/svn/trunk@5783 f16182fa-f095-11de-8f43-4547254af6c6
allow Enum.Ctor and Class.Static patterns

git-svn-id: http://haxe.googlecode.com/svn/trunk@5784 f16182fa-f095-11de-8f43-4547254af6c6