Passes all specs (except for removed feature - implicit self quest)

--HG--
extra : amend_source : db8dd9ac9fd6882e2f9e2ae9c4ea0e59dee3ddbe
Allow string as a decorator
Add parsing of decorator arguments
Add jump returns with -> and fixed comment parsing
Initial naive implementation of FileToplevel:decorators.import

--HG--
extra : amend_source : dbcdee18cf6e30cc547109ee892228d44fbfba7d
Started adding specs for the core Object component
Added parser specs for jump nodes
Added the Meme#expose accessor to prevent public registration