Convert InstallerController to passive controller

Signed-off-by: crynobone <crynobone@gmail.com>
Convert ExtensionController to passive controller, and do a huge refactors.

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

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

Conflicts:
	src/Orchestra/Foundation/Routing/CredentialController.php