Getting started

PT story https://www.pivotaltracker.com/story/show/74918112

Adding static_page for Getting_started guide
Adding links to the guide to the landing page Let's Code, Navigation bar, Welcome email

sorry to be such a pain, but this still has responsive issues:
![cutoff](https://cloud.githubusercontent.com/assets/2663402/3622952/4ce4d4c2-0e43-11e4-8799-e9ccb70aba2b.png)
it is being cut off at the end of the screen. Also can you remove the orange color?