Import the rosettacode.org Haskell examples as Snippets

As suggested here: https://www.reddit.com/r/haskell/comments/5vd4ag/hask_anything_now_less_alpha/de17bey/?context=3

The Haskell code snippets by themselves are available here: https://github.com/metaleap/rosetta-haskell-dump/

Suggested tags: "RosettaCode.org"

We could also add some of the more practical examples as "How do I..." content.