* use wrappedJSObject to create style elements in page context * skip unnecessary polyfills in content scripts * group all style management stuff in injector * support all API methods in content scripts
* Fix: make sure all errors are caught when initializing * Fix: polyfill localStorage and sessionStorage
* Add: polyfill to support chrome 49 * Fix: fetch text in Chrome 49 * Add: polyfill element method * Update usercss-meta * Fix: buggy destructuring * Fix: dialog position? * Fix: unneeded warning * Fix: getChromeVersion * Fix: don't cache tab icon in old chrome * Fix: static -> relative * Fix: use XHR as fallback