Fio blog post on Erwan Velu's fiograph tool

[Vincent Fu <vincentfu@xxxxxxxxx>]

I am happy to announce that the fio blog has a new post. I provide an 
introduction to the fiograph tool contributed by Erwan Velu. This clever 
script generates diagrams illustrating the main features of fio job 
files. Take a look:

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

Feedback is welcome!

Vincent