install haxedoc (fixed issue #1553)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6357 f16182fa-f095-11de-8f43-4547254af6c6
Failure means error (fixed issue #1582)

git-svn-id: http://haxe.googlecode.com/svn/trunk@6358 f16182fa-f095-11de-8f43-4547254af6c6