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

DemoPrograms old/Demo_Hello_World.py

@@ -0,0 +1,15 @@
+import PySimpleGUI as sg
+
+"""
+    Oh yes, the classic "Hello World".  The problem is that you
+    can do it so many ways using PySimpleGUI
+"""
+
+sg.PopupNoButtons('Hello World')         # the single line
+
+sg.Window('Hello world', [[sg.Text('Hello World')]]).Read()    # single line using a real window
+
+# This is a "Traditional" PySimpleGUI window code. First make a layout, then a window, the read it
+layout = [[sg.Text('Hello World')]]
+window = sg.Window('Hello world', layout)
+event, values = window.Read()