Test driven workshop

Why has the content changed? Any new additions ? The videos on stubbing and 3rd party interactions arent there anymore.

We’ve re-recorded and broken down the first part of the workshop, updated for the latest version of Rails.

The second half of the workshop, the part that used Twitter, was very error prone and hard to keep up to date. We are working to take that topic and move them into the new Trails format, as a series of exercises instead.

oh great wonderful