[jhc] darcs patch: update documentation with new extensions (and 1 more)

Tue Feb 14 09:23:59 PST 2012 John Meacham <john@repetae.net> * update documentation with new extensions Wed Feb 15 20:48:37 PST 2012 John Meacham <john@repetae.net> * add pragmaExp to the lexer/parser