[jhc] darcs patch: speed up parsing/lexing by using Name's ... (and 3 more)

Mon Jan 30 03:22:30 PST 2012 John Meacham <john@repetae.net> * speed up parsing/lexing by using Name's rather than Strings Tue Jan 31 13:49:51 PST 2012 John Meacham <john@repetae.net> * make IO a newtype of ST Tue Jan 31 17:59:18 PST 2012 John Meacham <john@repetae.net> * add DeNameable class to un-rename source before printing error messages. Tue Jan 31 23:34:00 PST 2012 John Meacham <john@repetae.net> * Rework the internal class representation to separate instances from class declarations