adding through exercise 2. parsing up to escaped ', http://en.wikibooks.org/wiki/Write_Yourself_a_Scheme_in_48_Hours/Parsing
completed and cleaned up 'First steps' in 'Write yourself a Scheme in 48 hous'
Going through the really helpful blog about parsec and the various monadic combinators, blog:  http://unbui.lt/#!/post/haskell-parsec-basics. playing around with examples.