Updates

* Worked around an issue with Chef, specically 'SSL validation of HTTPS requests is disabled.' by including the workaround described at http://stackoverflow.com/questions/22991561/chef-solo-ssl-warning-when-provisioning
* Upgraded PostgreSQL to 9.3
* Consistent quote styles in the Vagrantfile
the default python recipe includes pip and virtualenv
added dependancies to metadata.rb
removed python-psycogp2 cookbook from requirements
Merge branch 'release/1.0b3'

* release/1.0b3:
  removed python-psycogp2 cookbook from requirements