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CHANGES:
* add support for debian7, arch20132, fedora18 and ubuntu1304
rackspace images.
* drop support for arch201208 and fedora16 rackspace images
* bump Arch salt version to 0.11.1
* require the salt package and release version in the settings, when
building salt on a rolling release such as Arch.
* Arch 2012.08 is now a pure systemd installation
* nova client now requires specifying pub and priv networks
during a build. sleep longer during boot stage to prevent
extra api calls to rackspace.
* refactor salt states and move them to a new folder.
* add support for changing the remote directory of states and pillars.
* bump Fabric to 1.5.1, later to 1.6 (which helpfully resolved some
rebooting issues)
* bump python-novaclient to 2.13.0
* bump Jinja2 to 2.7