add podman remote client

podman client that is capable of:
 * images
 * ps
 * rm
 * rmi

this is only a mockup to frame out and prove python library and ssh
tunnelling usage.

Signed-off-by: baude <bbaude@redhat.com>

Closes: #986
Approved by: rhatdan

contrib/python/cmd/images.py

@@ -0,0 +1,21 @@
+from pman import PodmanRemote
+from utils import write_out, convert_size, stringTimeToHuman
+
+def cli(subparser):
+    imagesp = subparser.add_parser("images",
+                                   help=("list images"))
+    imagesp.add_argument("all", action="store_true", help="list all images")
+    imagesp.set_defaults(_class=Images, func='display_all_image_info')
+
+
+class Images(PodmanRemote):
+
+    def display_all_image_info(self):
+        col_fmt = "{0:40}{1:12}{2:14}{3:18}{4:14}"
+        write_out(col_fmt.format("REPOSITORY", "TAG", "IMAGE ID", "CREATED", "SIZE"))
+        for i in self.client.images.list():
+            for r in i["repoTags"]:
+                rsplit = r.rindex(":")
+                name = r[0:rsplit-1]
+                tag = r[rsplit+1:]
+                write_out(col_fmt.format(name, tag, i["id"][:12], stringTimeToHuman(i["created"]), convert_size(i["size"])))