Breed Class reconstructed.

Created tests for Breed Class in breed_spec.rb
Tested for: asking for non existing ande existing breed information, adding breed, and updating price.
Breed Class includes  name and price of the breed.
Breed Class Methods: reset(for testing purposes), add(to add name, price), update_price, and get_info
Breed Class data is stored as a new instance of BreedRepo Class in breed_repo.rb