Shared cookie storage support and other enhancements

    - Added cookie injection to RZPWKWebView that will soft-inject cookies from NSHTTPCookieStorage into the DOM. This will sync WKWebView cookies with UIWebView cookies as much as possible.
    - Added request property
    - Set scalesPageToFit on UIWebView to mimick WKWebView functionality
    - Set dataDetectorTypes property on UIWebView to detect all data types
Getting the value of `request` should not change its underlying type. If you need to mutate it, use a temporary variable and return a `-copy`.