How to run the tests?

1. Get RSpec http://rspec.info/
2. Do this:

  $ cd epub/bin
  $ spec spec/epub_spec.rb 

Or, prettier:

  $ cd epub/bin
  $ spec --format specdoc --color spec/epub_spec.rb 

3. Repeat for other files in spec/*spec.rb

How to make them more verbose?
1. Set $DEBUG to true (near the top of each spec)
