Move to PSR-4.

Signed-off-by: crynobone <crynobone@gmail.com>
Update file references on the compile list.

Signed-off-by: crynobone <crynobone@gmail.com>
Release v2.1.1

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1'

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

Conflicts:
	src/Orchestra/Optimize/compile.php