Feature/initial models

@jbrewton, @adavidev   
**Features to deploy**
* First cut of models and specs
* Does not include judging times
* Does not include views or controllers
* ~80% Code Coverage from specs
i would recommend doing this here and in several of the other tests http://betterspecs.org/#describe:
```ruby
describe :active? do
  it "should default to true" do
    expect(@category.active?).to eql true
  end
end
```