Rename screenshots consistently.

notepad/README.md

@@ -3,6 +3,8 @@
 A very simple notepad clone using the QTextEdit widget to handle more or less
 everything. Supports file loading, saving and printing.
 
+![No2Pads](screenshot-notepad.png)
+
 > If you think this example app is neat and want to learn more about
 PyQt in general, [take a look at my ebook & online course
 "Create Simple GUI Applications"](https://martinfitzpatrick.name/create-simple-gui-applications)

paint/README.md

@@ -8,14 +8,14 @@ few additions (and subtractions). The programme features standard
 tools including pen, brush, fill, spray can, eraser, text and a number of
 shapes. 
 
-![Piecasso](screenshot-paint2.png)
+![Piecasso](screenshot-paint1.png)
 
 You can copy from the image, with a custom shape,
 although pasting + floating is not supported. The canvas is a fixed size
 and loaded images are adjusted to fit. A stamp tool is also included
 which is pre-loaded with pictures of delicious pie.
 
-![Piecasso](screenshot-paint.png)
+![Piecasso](screenshot-paint2.png)
 
 > If you think this example app is neat and want to learn more about
 PyQt in general, [take a look at my ebook & online course

solitaire/README.md

@@ -5,7 +5,7 @@ The classic card Solitaire (Klondike) game with a North Korean /
  offering the same options. Built with PyQt, it uses QGraphicsScene
  to handle the play area.
 
-![Ronery](screenshot-solitaire.png)
+![Ronery](screenshot-solitaire1.png)
 
 The classic Solitaire win-screen is also implemented, although since
 the play canvas is not a bitmap it doesn't "fill up". It's still