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
I'm also okay with your preference to use a temporary mutable variable and always return a non-mutable copy.