Implement PSR-2 code standard.

Signed-off-by: crynobone <crynobone@gmail.com>
Implement PSR-2 code standard.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.0'

Conflicts:
	src/Orchestra/Extension/ExtensionServiceProvider.php
	src/Orchestra/Extension/ProviderRepository.php
	tests/ProviderRepositoryTest.php

Signed-off-by: crynobone <crynobone@gmail.com>