fixes #3967 - reworded message for OpenStack form

fixes #2542 - sort image listing with datatables

Feature #2368 - form helpers, exceptions and fixes

Feature #2368 - i18n extracting strings

fixes #2251 - adds openstack image listing

also refactor image list fetching

fixes #2229 add an IAM role field to a compute image.

This allows use of IAM to control access to AWS services within an instance.

removed the need to add 'btn' class for the action_buttons helper, and changed the action buttons to small.

fixes #1886 adds Rackspace V2 support

Based on GregSutcliffe's initial pull request.

minor visual fixes to the compute resource view.

adds ec2 provisioning support fixes #1223

- added progress bar for instance creation
- minor fixes for certname based deployments
- added ssh provisioning support to orchestartion, which utilize finish
scripts by default
- added images support (part of the vm compute tab)...