Added shelving procedures to User Guide

Added 'Shelve and unshelve an instance' section.

Change-Id: I6254bc624be9be3e4110a582d196ebbaacead13f
Updated architecture diagram and edit wording

Changed figref to updated logical architecture diagram; minor edits to wording
in the OpenStack architecture section

Change-Id: I1e70fdaff67ead88fd5878497cbcd712a5902148
backport: none
Closes-Bug: #1283467
Update cli commands with updated auto-command

Regenerated with proposed fix for openstack-doc-tools.

This changes the </computeroutput></screen> to be
on the last line of each change.

Also, the swift commands now do not use screen anymore.

Change-Id: I87f3c0acedc50798d1829966d62a393f49fad534
Merge "Update cli commands with updated auto-command"
Merge "Added shelving procedures to User Guide"
Fixes Bug 1292800

Added basic guidelines to follow for best results with VitrualBox
for controller node.

blueprint training-manuals
Closes-Bug: #1292800

Change-Id: I77165ff0d6e8b15ec09c14cd85d239097da5e032
Merge "Updated architecture diagram and edit wording"