* Skip urlRegex if it's used as a filter
* Add getRequiredContentScriptRegistrationPermissions function
* Add a reentrant check to google-docs.js
* Remove script node
* Move forceGoogleDocsHtmlRendering check into google-docs.js
* Replace document-start.js usage with google-docs.js
* Remove documentStart handling
* Add missing parameter descriptions
* Add accessibility option for forcing Google Docs HTML-based rendering
* Update settings
* Send a documentStart message at document start
* Add accessibility script for Google Docs
* Set up accessibility
* Update tests