Create network user guide

[Brian Curtin]

A user guide needs to be created for the network proxy to replace the current placeholder.

[Richard Theis (rtheis)]

The network user guide can be modeled after the compute user guide: http://git.openstack.org/cgit/openstack/python-openstacksdk/tree/doc/source/users/guides/compute.rst

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/249951

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/249996
Committed: https://git.openstack.org/cgit/openstack/python-openstacksdk/commit/?id=15ad36545707ad37c94fe17f5ed64156ecdea8ab
Submitter: Jenkins
Branch: master

commit 15ad36545707ad37c94fe17f5ed64156ecdea8ab
Author: Richard Theis <email address hidden>
Date: Wed Nov 25 13:48:48 2015 -0600

    Add documentation for testing examples

    Updated the contributing documentation to include information about
    testing the examples.

    Change-Id: I6ccb917d4f6eb3addeefba03f27f3107239e698c
    Related-Bug: #1466186

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/249951
Committed: https://git.openstack.org/cgit/openstack/python-openstacksdk/commit/?id=f15dabeac8f9a46a6f4fe0432a9f3e2e33e83b5f
Submitter: Jenkins
Branch: master

commit f15dabeac8f9a46a6f4fe0432a9f3e2e33e83b5f
Author: Richard Theis <email address hidden>
Date: Wed Nov 25 11:55:42 2015 -0600

    Add network user guide

    Add a network user guide to replace the current placeholder. Also,
    add to and update the network examples to go along with the guide.
    And finally, add a test for the network examples.

    Change-Id: Ib98a7632c3ccc9764a93831f0dbe597ce0bce606
    Closes-Bug: #1466186