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
Corrected some copy paste errors in SLES configuration.

- Corrected vm_name and output_dir regarding version and architecture.
- Made the syntax for vm_name uniform between VirtualBox and VMWare.
fix vmware-vmx tools install
Updated checksum and mirror to GA release
Added Solaris 11 support. Closes #213
Fix 'vmware-ovf' --> 'vmware-vmx'. Closes #230
Update RHEL7 checksums to GA version
Update RHEL 7 checksums to GA version
Merge pull request #221 from rickard-von-essen/sles_fix

Corrected some copy paste errors in SLES configuration.
Support CentOS 7.0