Update the "Transition to OpenStack Client" devref with information
about the new OSC command specs process. This process can be used
to propose new networking commands while deferring their
implementation. This process may help speed the overall transition
to OSC.

This update also includes information about the OSC neutron support
etherpad which provides detailed status for the transition.

And finally, updates were made to the overall transition plan
based on discussions at the midcycle.

Change-Id: I46bc066d2169a1e20af13baac7131ffa2eedd7c8
Related-Bug: #1521291

Added wrapper classes which are inherited from base data types tuple, dict
and str. Each of these wrapper classes contain a 'request_ids' attribute
which is populated with a 'x-openstack-request-id' received in a header
from a response body.

This change is required to return 'request_id' from client to log
request_id mappings of cross projects[1].

[1]: http://specs.openstack.org/openstack/openstack-specs/specs/return-request-id.html

Change-Id: I55fcba61c4efb308f575e95e154aba23e5dd5245
Implements: blueprint return-request-id-to-caller

Change-Id: Ia5cb007b0a0093e478416161763dcaa23b9cfbe4

Add developer reference for the transitition of the neutron CLI
support to the openstack CLI.

Change-Id: I5f9885eab7b6d1b6f4ee0d9cf84a07a0cb9d8c9a
Related-Bug: #1521291

Change-Id: Iae2c71695ed18504690cc953b4128aeaf3196275

Change-Id: Ie7f8b8d5751ff378e999287c29c1f3e4714ea64a