Create compute user guide

[Brian Curtin]

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

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/215823

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/215823
Committed: https://git.openstack.org/cgit/stackforge/python-openstacksdk/commit/?id=7e98020b837548c063b5fb0b3c9b1e49940230d5
Submitter: Jenkins
Branch: master

commit 7e98020b837548c063b5fb0b3c9b1e49940230d5
Author: Everett Toews <email address hidden>
Date: Fri Aug 21 15:37:14 2015 -0500

    The Compute User Guide

    The beginning of the compute user guide.

    This also begins the simplification of the examples, makes them
    more specific, and adds testing.

    Change-Id: Ic4bac2fe30601c196b03ce73b2dd04a916231f33
    Partial-Bug: #1487269
    Partial-Bug: #1419012
    Partial-Bug: #1466180

[Everett Toews (everett-toews)]

The Compute Guide has been published http://python-openstacksdk.readthedocs.org/en/latest/users/guides/compute.html