code: function startSpec (n, allSpecs, cfg, done) {
          var printId = n + 1;
          var specPath = allSpecs[n];
          var nSpecs = allSpecs.length;
          var msg = "Running spec file " + specPath + " [" + printId + "/" + nSpecs + "]";
  
          var bar = Array(process.stdout.columns).join("*");
          console.log("\n" + bar.cyan);
          console.log(alignCenter(msg).cyan);
          console.log(bar.cyan + "\n");
  
          var cb = getPhantomExitCb(n, allSpecs, cfg, done);
          startPhantom(specPath, cfg, cb);
      }
docs: Prints some info and relays config to start the n-th spec
  @param {Integer} n
  @param {Array} allSpecs
  @param {Object} cfg
  @param {Function} done