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Make :Eindex [no argument] open index.html
Create a presenter object for Episodes
Create Episode#running_time presenter method
Add an Episode#number presenter method
Create a VideoFile object to present ogg/quicktime metadata
Write a rake task to create data/videos.json from episode frontmatter
Generate data/videos.json for episodes 1-63
Update layout/views to use Episode presenter methods
Remove helper methods for formatting time