Added chrome to qunit build, tried no sandbox flag on chrome

.travis.yml

@@ -13,6 +13,9 @@ env:
 
 matrix:
   include:
+    - env: TOX_ENV=qunit
+      addons:
+        chrome: stable
     - env: TOX_ENV=py34-first_startup
       addons:
         &py3_addons

client/karma.config.base.js

@@ -5,8 +5,14 @@ module.exports = {
     failOnEmptyTestSuite: false,
     webpack: webpackConfig,
     webpackMiddleware: { noInfo: false },
-    browsers: ["ChromeHeadless"],
+    browsers: ["ChromeHeadlessNoSandbox"],
     client: {
         captureConsole: true
+    },
+    customLaunchers: {
+        ChromeHeadlessNoSandbox: {
+            base: "ChromeHeadless",
+            flags: ["--no-sandbox"]
+        }
     }
 }