Moved all demo programs into subfolder

Demo_Design_Pattern_Persistent_Window.py

@@ -1,25 +0,0 @@
-import sys
-
-if sys.version_info[0] >= 3:
-    import PySimpleGUI as sg
-else:
-    import PySimpleGUI27 as sg
-
-layout =    [
-            [sg.Text('Your typed chars appear here:'), sg.Text('', key='_OUTPUT_')],
-            [sg.Input(do_not_clear=True, key='_IN_')],
-            [sg.Button('Show'), sg.Button('Exit')]
-            ]
-
-window = sg.Window('Window Title').Layout(layout)
-
-while True:  # Event Loop
-    event, values = window.Read()
-    print(event, values)
-    if event is None or event == 'Exit':
-        break
-    if event == 'Show':
-        # change the "output" element to be the value of "input" element  
-        window.FindElement('_OUTPUT_').Update(values['_IN_'])
-
-window.Close()