Merge pull request #331 from steventlamb/master

Decrease precedence of app role vars
Modify provisioner to support more recipients
Move app vars to global vars
Always try to create database

Previously, we were always running this, because we were always dropping
databases. This was bad for production releases.

Then, we were never running this, which was bad for new builds.

Fortunately, this is a non-destruction action, so it is save to run and
ignore the errors.
Run collectstatic on dev

so the newly installed dev apps get collected too
Provision travis with ansible

Unfortunately, this still fails, but it's on the right track, and
ultimately easier to support.