* 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
* Fix spacing
* Add more parameters to injectStylesheet
* Add more parameters to injectScript
* Update ScriptManager to support content script registration
* Add webNavigation as an optional permission