Refactor out item and repository class
Use config.ru

This will allow us to run on Heroku
Repository knows how to add an item
Successfully edit an item
Allow for deletion of item
Put in some notes about implementation
Remove stray puts
Move matches? to the item class

It is better for an item to know what it means to match a string
than the repository determining this. This way the repository
doesn't need to know anything about what matches means