Add George Shank to mentor list

Let's do this! 🙌
Merge pull request #3 from taterbase/master

Add George Shank to mentor list
add me (i'm jason rhodes)
Merge pull request #4 from jasonrhodes/master

add me (i'm jason rhodes)
Added Matt Hernandez as a mentor

Added details for Matt Hernandez as a mentor.
Merge pull request #5 from fiveisprime/master

Added Matt Hernandez as a mentor
[doc] Add indexzero as a mentor.