Update example with correct provider

Updating example with new format to include correct provider.
Adding IAD as well as updating providers
change region name to match Rackspace
Update rackspace.rst
Revert driver to 'openstack' from 'rackspace'
Fix key in node description
Merge pull request #831 from s0undt3ch/develop

Update to salt-bootstrap v1.5.8.
Create networks sections for OpenStack provider

The first step at attempting to address issue #637 and issue #791
requires the ability to provision specific networks within a VM.

Now, a user will be able to select a specific network uuid with the
following configuration::

    networks:
        - 4402cd51-37ee-435e-a966-8245956dc0e6

Note: You are able to pass multiple network UUIDs to openstack too.

Signed-off-by: Paul Belanger <paul.belanger@polybeacon.com>
Merge pull request #832 from pabelanger/temp/openstack_networks

Create networks sections for OpenStack provider
Merge pull request #834 from s0undt3ch/develop

To keep temp files all it's needed now is an extra flag.
Merge pull request #833 from getlantern/develop

Fix key in node description
Merge pull request #823 from duncanmurray/patch-1

Update example with correct provider
Fix name error.