add templates for Ubuntu 14.04
Cleanup inconsistencies in Ubuntu templates.

* Build all templates non-headless so we can see error output
* Remove extraneous provisioner
Merge pull request #206 from juliandunn/cleanup-ubuntu-templates

Cleanup inconsistencies in Ubuntu templates.
Add links to new ubuntu images
Merge pull request #209 from Maks3w/patch-1

Add links to new ubuntu images
Support Red Hat Enterprise Linux 7 Release Candidate.
Fix company name in README
Update to OmniOS r151008t
Update Debian Wheezy to 7.5
Update to Packer 0.5.2
Remove ancient "hidden" files
Bring under the Release Engineering umbrella