add LugonjaAleksandar as a contributor for code

Exposed "shared" property of HttpServer bind method to support more use-cases.

Added InAppWebViewSettings.allowBackgroundAudioPlaying for Android, Added WebViewAssetLoader and InAppWebViewSettings.webViewAssetLoader for Android

add chandrabezzo as a contributor for code

Added windowType, windowAlphaValue, windowStyleMask, windowTitlebarSeparatorStyle, windowFrame for MacOS InAppBrowserSettings

updated README, fixed swift Util getUrlAsset and getAbsPathAsset, fixed NSColor, added WKWebView runOpenPanelWith event