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.
Keeping `@csv_files` as an instance variable is probably not that useful. You never retrieve it. Better to pass it as an argument to `csv_files_to_dinosaurs`. Honestly, you could even move the outer loop into `initialize`:

```
def initialize(csv_files)
  @dinosaurs = []
  csv_files.each do |file|
    load_csv_file(file)
  end
end