impressConsole broke init() if root element didn't have id="impress"

Also adds regression tests to prevent this from happening in the future
as well as upgrades karma-chrome-launcher to newest version.

Fixes #654

karma.conf-sauce.js

@@ -55,6 +55,7 @@ module.exports = function( config ) {
       // The QUnit tests
       "test/helpers.js",
       "test/core_tests.js",
+      "test/non_default.js",
       "src/plugins/navigation/navigation_tests.js",
       // Presentation files, for the iframe
       {pattern: "test/*.html", watched: true, served: true, included: false},