Moved all demo programs into subfolder

DemoPrograms/Demo_Keyboard_Realtime.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+
+layout = [[sg.Text("Hold down a key")],
+          [sg.Button("OK")]]
+
+window = sg.Window("Realtime Keyboard Test", return_keyboard_events=True, use_default_focus=False).Layout(layout)
+
+while True:
+    event, values = window.Read(timeout=0)
+
+    if event == "OK":
+        print(event, values, "exiting")
+        break
+    if event is not sg.TIMEOUT_KEY:
+        if len(event) == 1:
+            print('%s - %s' % (event, ord(event)))
+        else:
+            print(event)
+    elif event is None:
+        break