Project take over !

* First changes for v68.0 Thunderbird  version
* Adds CI to automatically lint the `user.js` script
* Updates links due to repository transfer

.travis.yml

@@ -0,0 +1,8 @@
+language: node_js
+node_js:
+  - 'node'
+
+before_script:
+  - npm install -g acorn
+script:
+  - acorn user.js