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)
- cleanup a lot of unused view attributes in favour of a couple html5
data attributes
- adds capabilities to each compute resource (e.g. build vs. image
provisioning)
- allow to access @host.compute_resource and @host.info in provisioning
templates
- added automatic ssh key pair generation when creating a new compute
resource (note, if you already created one, you would need to delete
it and create it again
- reverse dns now depends on the selected subnet - fixes #1558
- added readonly console support for ec2