Add Sample and documentation

[evilz]

What is it for ? What can I do with it ? And how ?

[natalie-o-perret]

Resources:

• https://github.com/fsprojects/FSharpPlus - http://fsprojects.github.io/FSharpPlus/
• https://github.com/matthewcrews/flips - https://flipslibrary.com/#/

Also can stuff the README.md