Major update of all demo programs to use new PEP8 bindings, etc

DemoPrograms old/Demo_Chat.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python
+import sys
+if sys.version_info[0] >= 3:
+    import PySimpleGUI as sg
+else:
+    import PySimpleGUI27 as sg
+
+'''
+A chat window.  Add call to your send-routine, print the response and you're done
+
+To see this program RUN on the web go here:
+https://repl.it/@PySimpleGUI/Chat-Application-Demo
+
+Note that the size of the display on repl.it is smaller than most, so the sizes of the
+Multiline and Output text areas were reduced in the online version.  Nothing else was changed
+'''
+
+sg.ChangeLookAndFeel('GreenTan')            # give our window a spiffy set of colors
+
+layout =  [ [sg.Text('Your output will go here', size=(40, 1))],
+            [sg.Output(size=(127, 30), font=('Helvetica 10'))],
+            [sg.Multiline(size=(85, 5), enter_submits=True, key='query'),
+            sg.Button('SEND', button_color=(sg.YELLOWS[0], sg.BLUES[0]), bind_return_key=True),
+            sg.Button('EXIT', button_color=(sg.YELLOWS[0], sg.GREENS[0]))]]
+
+window = sg.Window('Chat window',
+                   default_element_size=(30, 2),
+                   font=('Helvetica',' 13'),
+                   default_button_element_size=(8,2)).Layout(layout)
+
+# ---===--- Loop taking in user input and using it  --- #
+while True:
+    event, value = window.Read()
+    if event == 'SEND':
+        query = value['query'].rstrip()
+        # EXECUTE YOUR COMMAND HERE
+        print('The command you entered was {}'.format(query))
+    elif event in (None, 'EXIT'):            # quit if exit button or X
+        break
+sys.exit(69)
+