Renamed demo files, new demo of tabbed forms

Changed filenames to remove spaces so will be easier to work with on Linux.

Demo_NonBlocking_Form.py

@@ -0,0 +1,59 @@
+import PySimpleGUI as sg
+import time
+
+def main():
+    StatusOutputExample()
+
+# form that doen't block
+def StatusOutputExample_context_manager():
+    with sg.FlexForm('Running Timer', auto_size_text=True) as form:
+        output_element = sg.Text('', size=(8, 2), font=('Helvetica', 20))
+        form_rows = [[sg.Text('Non-blocking GUI with updates')],
+                     [output_element],
+                     [sg.SimpleButton('Quit')]]
+
+        form.LayoutAndRead(form_rows, non_blocking=True)
+
+        for i in range(1, 1000):
+            output_element.Update('{:02d}:{:02d}.{:02d}'.format(*divmod(int(i/100), 60), i%100))
+            button, values = form.ReadNonBlocking()
+            if values is None or button == 'Quit':
+                break
+            time.sleep(.01)
+        else:
+            form.CloseNonBlockingForm()
+
+
+# form that doen't block
+def StatusOutputExample():
+    # Make a form, but don't use context manager
+    form = sg.FlexForm('Running Timer', auto_size_text=True)
+    # Create a text element that will be updated with status information on the GUI itself
+    output_element = sg.Text('', size=(8, 2), font=('Helvetica', 20))
+    # Create the rows
+    form_rows = [[sg.Text('Non-blocking GUI with updates')],
+                 [output_element],
+                 [sg.SimpleButton('Quit')]]
+    # Layout the rows of the form and perform a read. Indicate the form is non-blocking!
+    form.LayoutAndRead(form_rows, non_blocking=True)
+
+    #
+    # Some place later in your code...
+    # You need to perform a ReadNonBlocking on your form every now and then or
+    # else it won't refresh
+    #
+
+    for i in range(1, 1000):
+        output_element.Update('{:02d}:{:02d}.{:02d}'.format(*divmod(int(i / 100), 60), i % 100))
+        button, values = form.ReadNonBlocking()
+        if values is None or button == 'Quit':
+            break
+        time.sleep(.01)
+    else:
+        form.CloseNonBlockingForm()
+
+
+
+if __name__ == '__main__':
+
+    main()