depend on current parsley 0.9.2 and make sexpr-grammar/-parser more modular

Actually, this change is meant to go into clojar's paredit-version 0.9.3, because of it's usage by the kovasb/Nightcode project... so I don't know about the status of your ccw-version. Zach Oakes told me that this is your master-version.

This change would enable use of parsley-views, but keeping your sexpr-grammar.

Best,
Joerg