Just run the Karma tests once and exit since I never want to use Karm…

…a in that way, and when I tested it I found it to be unreliable anyway.

karma-conf.js

@@ -67,6 +67,6 @@ module.exports = function(config) {
 
     // Continuous Integration mode
     // if true, Karma captures browsers, runs the tests and exits
-    singleRun: false
+    singleRun: true
   });
 };