Render a region view with a list of deployments
function getDeployments(req, res) {
    async.parallel({
      stack: dreadnot.getStackSummary.bind(dreadnot, req.params.stack),
      region: dreadnot.getRegionSummary.bind(dreadnot, req.params.stack, req.params.region),
      deployments: dreadnot.getDeploymentSummaries.bind(dreadnot, req.params.stack, req.params.region)
    }, renderCallback(req, res, 'deployments.jade'));
  }