Add minimal documentatation to restic package

doc.go

@@ -0,0 +1,6 @@
+// Package restic is the top level package for the restic backup program,
+// please see https://github.com/restic/restic for more information.
+//
+// This package exposes the main components needed to create and restore a
+// backup as well as handling things like a local cache of objects.
+package restic