FDP blog post

[Vincent Fu <vincentfu@xxxxxxxxx>]

I am pleased to share a blog post on FDP co-authored by Arun George, 
Ankit Kumar, and me:

https://github.com/vincentkfu/fio-blog/wiki/FDP

We provide a brief introduction to FDP and then walk through an example 
exercising fio's FDP support.

Take a look! Feedback is welcome.

Vincent