Added Support for Toast Notifications on AJAX requests made using XMLHTTPRequest and partly for fetch requests

You can now send toast notifications on AJAX request.

• Full support for traditional XMLHTTPRequest based AJAX calls #8.
• Partial support for AJAX calls made using the browser native fetch requests.
  • To show a toast notification on fetch response. You have to handle the response and use JavaScript to show the message. for e.g.

fetch('/Home/Ajax').then(function(response){
	var messages = nToastNotify.toastr.fetchGetMessagesFromResponse(response);
	nToastNotify.toastr.showToasts(messages)
})

• Minor preparations to support multiple third party library #13 .

Breaking Changes

• ToastEnums changed to Enums
• AddToastNotify() method now needs to be used on IMvcBuilder interface. For e.g.

services.AddMvc().AddNToastNotify(new ToastOption()
            {
                ProgressBar = false,
                PositionClass = ToastPositions.BottomCenter
            }, new NToastNotifyOption()
            {
                SuccessMessage = "Overwritten default success message"
            }); ;

Also need to add as middleware in the Configure method.

            app.UseNToastNotify();