Allows for only using a set of CCs.
Phony::Config.load(only: ['41', '44']).included_ccs.assert == ['41', '44']
Phony::Config.load(only: ['41', '44']).excluded_ccs.assert == []
Allows for excluding CCs.
Phony::Config.load(except: ['41', '44']).included_ccs.assert == []
Phony::Config.load(except: ['41', '44']).excluded_ccs.assert == ['41', '44']
Default is loading all.
Phony::Config.load.included_ccs.assert == []
Phony::Config.load.excluded_ccs.assert == []
Convenience form.
Phony::Config.load('41', '44').included_ccs.assert == ['41', '44']
Phony::Config.load('41', '44').excluded_ccs.assert == []