returned meta_* inherit to module
added task.Parameter
Revert "added task.Parameter"

This reverts commit bdc50c92c695d2d19b3b937296ef85634795e042.
removed meta_style.setter
removed meta_strict setter
removed meta_signature.setter
removed meta_plain.setter
removed meta_inherit.setter
removed meta_fallback.setter
removed meta_docstring setter
removed meta_dispatcher.setter
removed meta_chdir.setter
removed meta_cache.setter
removed meta_basedir.setter
removed meta_default.setter
removed meta_style.setter from module, var