inclusion of podman network

adding podman network and the subcommands inspect, list, and rm.  the
inspect subcommand displays the raw cni network configuration.  the list
subcommand displays a summary of the cni networks ala ps.  and the rm
subcommand removes a cni network.

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

docs/podman-network-rm.1.md

@@ -0,0 +1,25 @@
+% podman-network-rm(1)
+
+## NAME
+podman\-network-rm- Delete a Podman CNI network
+
+## SYNOPSIS
+**podman network rm**  [*network...*]
+
+## DESCRIPTION
+Delete one or more Podman networks.
+
+## EXAMPLE
+
+Delete the `podman9` network
+
+```
+# podman network rm podman
+Deleted: podman9
+```
+
+## SEE ALSO
+podman(1), podman-network(1), podman-network-inspect(1)
+
+## HISTORY
+August 2019, Originally compiled by Brent Baude <bbaude@redhat.com>