Exercise 5 - Adding permissions and payments

[CarlosBordachar]

• Use dummy token faucet to get dummy tokens
• Use ex5a_i_have_dtk() to show you managed to use the faucet (2 pts)
• Create a function to allow breeder registration.
• This function should charge the registrant for a fee, paid in dummy tokens (check registration_price)
• Add permissions. Only allow listed breeders should be able to create animals
• Deploy your new contract
• Call submit_exercise() in the Evaluator to configure the contract you want evaluated
• Call ex5b_register_breeder() to prove your function works. If needed, send dummy tokens first to the evaluator (2pts)