LIBCLOUD-296 : stopped state for compute nodes

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
Update CHANGES.
Add the Hong Kong (HKG) endpoint for Rackspace

Rackspace has opened a datacenter in Hong Kong with an endpoint name
of HKG. This change adds the endpoint to the endpoint mappings for
the compute and loadbalancer packages.

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
Update CHANGES.
docs: Update upgrade notes.
Add missing docstring for a new node state.
docs: Update upgrade nodes.

Add a section about new NodeState.STOPPED node state.
Update exception which gets thrown if user uses an old Rackspace provider
constant.
Bump version to 0.14.0-beta2.
docs: Fix title underline.
LIBCLOUD-415 try fix keypair delete * add tests for delete keypair

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
Remove blank lines, update changes.
Issue LIBCLOUD-417: Add support for more EC2 Elastic IP Address operations.

Add support for:

DisassociateAddress
ReleaseAddress
AllocateAddress

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
Update changes.
For consistency and accuracy, rename "ex_associate_addresses" method in the
EC2 driver to "ex_associate_address_with_node".
Pep8 and fix ex_owner handling in the list_images method.
docs: Update upgrade notes.
Fix ex_list_publis_ips in the CloudStack driver so it works with basic zone.

Part of LIBCLOUD-418.