[X4]

Looks really good, but as others noted, the examples should really work `as is` within the REPL. Also I think wikipedia has better example code. Everybody knows fibonacci and can compare it.

Please add a nice Haskell facts and features tab, like: Appeared in 1990; 24 years ago More facts and features on: http://en.wikipedia.org/wiki/Haskell_(programming_language)