Merge pull request #32 from aaron0browne/tutorials

First tutorial post and a link on the Docs page.
Merge pull request #33 from aaron0browne/tutorials

Edits to first tutorial post
Removed "(this is real)" from "Nationally Funded"

I don't think this is necessary, and just feels a little defensive.
Merge pull request #34 from mitalia/gh-pages

Removed "(this is real)" from "Nationally Funded"
Add mailing list form on contact page

Fix #35
Tutorial post on system configuration

A bash script to get CentOS 6 machines up and running with system
packages needed for Harvest and code contribution, including python 2.7