Add Ubuntu 12.04, Ubuntu 13.10 and CentOS 5.6 boxes for vagrant-parallels.

The boxes were prepared by Veewee, and contain both Chef and Puppet.
As usual, the boxes are not covered by any warranty, expressed or implied.

Vagrant Parallels provider can be downloaded from Parallels github page:
https://github.com/Parallels/vagrant-parallels
Merging in https://github.com/racktear/vagrantboxes-heroku/commit/89a1b785eb87bb3c553d8d6d9a029355e51779cf
Conflicts:
	www/index.html
Merge branch 'racktear-master' #277 Merging in commit https://github.com/racktear/vagrantboxes-heroku/commit/89a1b785eb87bb3c553d8d6d9a029355e51779cf