Tyler Breland: Dinodex solution

instantiate with 

    m = DinoDex.new

query by

    m.where({continent: 'Africa'})

chain with

    m.where({continent: 'Africa'}).limit(3).sort('name')

advanced operations (<, >, >=, <=, ==)

    m.where({continent: 'Africa'}).where({weight_in_lbs: {'<' => 1000}}).limit(3)

format with

    m.where({continent: 'Africa', weight_in_lbs: {'<' => 1000}}).limit(3).pretty
    m.where({continent: 'Africa', weight_in_lbs: {'<' => 1000}}).limit(3).to_json
rubocop throws err past 80 cols, would the better syntanx be

```
  attr_accessor :period
  attr_accessor :continent
  attr_accessor :diet
  attr_accessor :weight_in_lbs
  attr_accessor :walking
  attr_accessor :description
```

etc. ?