Updating the RSpec website.

So opening a PR to discuss and work on the new RSpec website. I'd like to use the refresh branch here as development "master" and this should mean as we branch off it and merge back that we see all our lovely changes add up here. @mootpointer has been working on it but I know @cupakromer has expressed an interest in contributing here (mostly with awesome tutorial content see [cupakromer/rspec-tutorial](https://github.com/cupakromer/rspec-tutorial) as has @sjahandideh. (I say this on the internets so it must be true).

See #8 for the Redpen draft's, I'm assuming there are further updated ones somewhere @mootpointer?

So I've taken the liberty of sprucing this up a bit as prep for getting it up here, you can see I've set middleman up to squash assets and use directory indexes for pretty urls all things that's be good on the real site. I've also linked up navigation and roughed some outlines for the sort of content we might want.

You can also find a live preview here: [http://rspec-www-preview.herokuapp.com/](http://rspec-www-preview.herokuapp.com/) (Sorry @sjahandideh, feel free to setup a preview on @ninefold instead, I just can't do that easily)

To Do:

* [ ] Actually implement the rest of the homepage
* [ ] Implement the about page design
* [ ] Write proper content for:
  * [ ] About
  * [ ] Contributing
  * [ ] Documentation
  * [ ] Getting Help (prehaps we can work @cupakromer's content in here?)