Documentation on Fey

[Tony Faustini]

Hi all, I don’t know if you have had a chance to review the documentation on 
Fey in the README.md files e.g.  
https://github.com/apache/incubator-iota/blob/master/fey-core/README.md 
<https://github.com/apache/incubator-iota/blob/master/fey-core/README.md>
Any feedback would be great.
-Tony