Redirect lessons

Shoutout @cobyism for having an amazingly easy OSS project that allowed me to throw together this landing page with literally 0 headaches.

also, cc @github/training-team, checkout to this branch, run `script/bootstrap` and `jekyll serve` and tell me what you think.

![screen shot 2013-06-29 at 4 57 23 pm](https://f.cloud.github.com/assets/45141/726629/b64150f8-e117-11e2-8743-b339d01b6e47.png)