--restore bug

--restore was acting on more stuff than needed.
--no-act
--Restore bug.
Use --dev-null as config in t/save t/restore
Create tests for diff and the required extras
--no-act tests.
--no-act
Merge branch 'feature--no-act' into feature--noact-test

Conflicts:
	metamonger
Merge remote-tracking branch 'errietta/feature--noact-test'
t/files/config_empty: Use non-existing config stanza