Add some unit tests! (Refactoring where neccesary)

[stevenday]

We need some unit tests, ideally covering at least:

• The code which validates sites on the homepage
• The code which validates input generally
• The code which saves things into localstorage/gets things back
• The code around building forms from objects and loading them (if this isn't all Backbone-Forms)
• General front-end driving stuff like links going to the right pages, pages having what you'd expect on them, things updating when you do stuff, etc