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
This is the current behavior of UIWebView's request getter, which I agree is strange. I decided to imitate it exactly in case a potential user of this library is currently relying on that behavior in their code. Will return the expected type instead if you'd prefer to behave the way that makes the most sense as opposed to the way Apple does things.