Vagrant Local Development

This commit adds playbooks and files necessary to do local development
from within Vagrant.

These playbooks start with a fresh Ubuntu 12.04 machine and:
  - Install Ansible
  - Install the Tower nightly
  - Install all components to exactly mirror production, except Apache
  - Install uwsgi and nginx for local development (since Apache lacks a
working auto-reload)

This isn't entirely perfect -- in particular, developing on task code
is probably challenging until I figure out how to get celery not to
read from the install, but it is a very easy way to get 90% of the way
there very, very quickly.

ansible.cfg

@@ -0,0 +1,15 @@
+[defaults]
+
+# Connections
+host_key_checking = False
+record_host_keys = False
+pipelining = True
+
+
+# Command-line specific
+module_name = shell
+
+
+# Paths
+roles_path = setup/roles:tools/vagrant/roles
+