Add config file fixture
Merge remote-tracking branch 'origin/1.3.1-wip' into 1.3.1-config
add confif loader spec
add loader source
Update loader
add config section sources
add spec
Update peridot version(1.3.0)
Merge remote-tracking branch 'origin/1.3.1-wip' into 1.3.1-config

Conflicts:
	composer.json
add namespace section seoc
add root section spec
add apply code
use section
throw exception
Merge remote-tracking branch 'origin/1.3.1-config' into 1.3.1-wip