Moving to PSR-4
Minor readability changes on tests
Removing unused file
Adding PHPCS to composer
Improving readability
Simplifying things
Reorganizing exceptions
Adding tests for PagSeguroException
Adding tests for client
Adding tests to ConsultationService
Adding tests to Notification service
Adding tests for PaymentService
Removing credentials from payment encoder
Pulling up some attributes
Extracting credentials insertion to BaseService
Enabling sandbox mode (closes #8)
Updating Readme