C0001 add category and subcategories relationship

Pulling exactly what you wanted in the frontend was a little complicated so I decided to just drop 3 static columns for your css classes (center-one, two and three). If you still want to go with different types of columns for the subcategories, you are going to need to add a field in the database to decide how many ul tags you are going to need and mix them with left-list and right-list.

Make sure to run: 
```
rake db:seed
```

This will delete all previous categories and subcategories and create the new ones for the test. Also, you should check out the docs for the "in_groups_of" function which I used to create an array of 2-3 items which each had arrays too with the actualy Categories or Subcategories.