Finished up with Forms.hs for now.

Finished: process :: (SExpr a) -> [Form a]
	  pretty-printing of type (Form a), (Binding a)
	  added Forms and Parse modules to silveretta-hs.cabal

Todo: add requirement of library "pretty" to silveretta-hs.cabal; for
      now just `cabal install pretty' and it should work find.