Need to do general refactoring.

[Kattixie]

I learned a lot throughout this project and came up with different techniques for handling media queries, Angular code organization, etc. In a perfect word these techniques should be consistent throughout the project. Mostly I'm putting this here to signal that I'm aware of the inconsistencies.

• One area I definitely want to re-work is the categories listing. This is one of the first views I built.
• Should also make sure bindToController: true and ctrl = this is used wherever possible.

[Kattixie]

I did re-work the category listing into a directive.