Added ConsoleBrowser2 and WebpageSnapshot demos

- Split the Lazarus demos directory into "Lazarus_Windows" and "Lazarus_Linux".
- Added OSRExternalPumpBrowser and TinyBrowser2 demos to "Lazarus_Linux".
- Set TBufferPanel.GetScreenScale as virtual.
- Added DevTools to the SchemeRegistrationBrowser demo.
- Modified the SchemeRegistrationBrowser demo to receive XMLHttpRequest requests from JavaScript.

bin/test.js

@@ -1,5 +1,15 @@
 function myAlertFunction() {
-
     alert('This alert dialog is declared in a local JS file.');
-
+}
+
+function sendCustomReq() {
+	var xhr = new XMLHttpRequest();
+	var url = 'hello://localhost/customrequest?name1=value1';
+	xhr.open('GET', url, true);
+	xhr.onreadystatechange = function() {
+		if(xhr.readyState == 4 && xhr.status == 200) {
+			alert(xhr.responseText);
+		}
+	}	
+	xhr.send();
 }