Copying the common.json from the repo instead of creating an empty one. (#255)
Gave up on the puppetlabs/nginx module. Too complicated and it doesn't do the job. (#255)
Added class for installing the proxy for the dashboard API on a machine. (#255)
Added role for dashboard API. (#255)

This is inherited from cruncher because the ami-api module also has to
be installed on that machine.
Installing the API close to the Redis it's reading from. (#255)