Running Tobi updates/changes

So the curriculum was down, found this, need it for my course tomorrow so I am hard at work doing updates to both the structure and the content. See the commits for a more detailed description of what I did. Bigger stuff is:

* remove site.baseurl to make running from a fork easier
* updates to the README (too many because I was kind of dump)
* use the github-pages gem for compatibiity
* exchange the markdown renderer to silence warnings
* fix errors in index.md

Upcoming: content changes/possibly rails 4 updates.