Use Karma Summary Reporter instead of progress reporter on CI

The progress reporter is quite hard to read on CI especially with multiple browsers.

This should be much easier to read.

Author: f2prateek

karma.conf.ci.js

@@ -74,7 +74,7 @@ module.exports = function(config) {
 
     retryLimit: 5,
 
-    reporters: ['progress', 'junit'],
+    reporters: ['summary', 'junit'],
 
     browsers: ['PhantomJS'].concat(Object.keys(customLaunchers)),
 

package.json

@@ -78,6 +78,7 @@
     "karma-phantomjs-launcher": "^1.0.0",
     "karma-sauce-launcher": "^1.0.0",
     "karma-spec-reporter": "0.0.26",
+    "karma-summary-reporter": "^1.5.0",
     "mocha": "^2.2.5",
     "phantomjs-prebuilt": "^2.1.7",
     "proclaim": "^3.4.1",