Continue switching from libkpod to libpod

Refactored rmi, images, diff, and history.
Made fixes to kpod images in the way it was handing the templates as well as printing the image names

Signed-off-by: umohnani8 <umohnani@redhat.com>

cmd/kpod/save.go

@@ -5,7 +5,6 @@ import (
 	"os"
 
 	"github.com/kubernetes-incubator/cri-o/libpod"
-	"github.com/kubernetes-incubator/cri-o/libpod/images"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
@@ -72,12 +71,12 @@ func saveCmd(c *cli.Context) error {
 
 	var dst string
 	switch c.String("format") {
-	case images.OCIArchive:
-		dst = images.OCIArchive + ":" + output
-	case images.DockerArchive:
+	case libpod.OCIArchive:
+		dst = libpod.OCIArchive + ":" + output
+	case libpod.DockerArchive:
 		fallthrough
 	case "":
-		dst = images.DockerArchive + ":" + output
+		dst = libpod.DockerArchive + ":" + output
 	default:
 		return errors.Errorf("unknown format option %q", c.String("format"))
 	}