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)...

fixes #1120 - Replaced DHCP functionaitlity by the new net dhcp record classes

Fixes #674 - Rails Queue class conflict with Orchestration Queue

Signed-off-by: Paul Kelly <paul.ian.kelly@googlemail.com>