First Dino Dex Program

I have it set up right now to just run the code in the Main class, and it prints the results to the console.
Too many sets of local `dinosaurs` vars. `@data.map` would accomplish the same in this case:

```
data.map do |row|
  hash = self.class.convert_import_hash(row.to_hash)
  Dinosaur.new(hash)
end
```

Any time you can avoid setting a local, try to do that. Less to have to reason about. Ditto class vars. Just pass it into the method.