changed (object) NULL to new stdClass

Only the biggest dudes use (object) NULL, but @thepablick thinks it is not understandable. https://twitter.com/thepablick/status/271538482332176384
Forms: hash of GET forms is in action
Latte: fixed macro prefix passing

Set MacroNode prefix for n:inner-macro.
Latte: recognizes {Namespace\Class::member}