Merge pull request #28 from ueg1990/master

Add Getting Started Testing by Ned Batchelder (PyCon US 2014)
Add a JSON file representing videos from 2014.
Add tags to allow further categorisation of videos.
Merge pull request #29 from amorphic/master

Add a JSON file representing videos from 2014.
Add 2009-2013 videos to `videos.json`.
Merge pull request #30 from amorphic/master

Add 2009-2013 videos to `videos.json`.