Simple `ouch` CLI tool

Hi. This is just simple, not that useful yet, CLI `ouch` tool. I'm actually using when playing with [Ouch Web](https://github.com/mkrauskopf/ouch-web) so sharing here. In the future it could grow into decent tool configurable via CLI options and showcases OUCH feature set. Depending whether there are some plans with OUCH itself at all ;)

I'm not chemist, just wanting to learn Haskell and curious about chemistry from layman point of view. So I could do the drudgery non-chemical works :)

Cheers,
\- m.