add COPYING, add screenshots to readme

COPYING

@@ -0,0 +1,18 @@
+YETI3D PRO Source Code
+Dated: 17/8/2004
+
+Here is a copy of Yeti3D PRO taken from a backup CD dated 17/8/2004.
+
+Only the core source code is provided. None of the original sprites or MD2 
+models are provided, except the ANSI C data files.
+
+I have included the World Editor and MD2 Model Converter tools which require
+Borland C++Builder 6+ to compile. You should be able to get them running
+on older versions with some hacking.
+
+I have included the Win32 platform code which will show you how to get a 
+basic Yeti3D PRO system running.
+
+This project is as old as the hills and I doubt this was the last version.
+
+Use this code as you will.

README.md

@@ -1,22 +1,5 @@
-YETI3D PRO Source Code
-Dated: 17/8/2004
-
-Here is a copy of Yeti3D PRO taken from a backup CD dated 17/8/2004.
-
-Only the core source code is provided. None of the original sprites or MD2 
-models are provided, except the ANSI C data files.
-
-I have included the World Editor and MD2 Model Converter tools which require
-Borland C++Builder 6+ to compile. You should be able to get them running
-on older versions with some hacking.
-
-I have included the Win32 platform code which will show you how to get a 
-basic Yeti3D PRO system running.
-
-This project is as old as the hills and I doubt this was the last version.
-
-Use this code as you will.
+# Yeti3D PRO SDL3 Port
 
 |                                |                                |                                |
-|----------------------------------|-------------------------------|--------------------------------|
-| ![](./screenshots/thetemple.jpg) | ![](./screenshots/yeti3d.png) | ![](./screenshots/pacyeti.jpg) |
+|--------------------------------|--------------------------------|--------------------------------|
+| ![](./screenshots/yeti006.png) | ![](./screenshots/yeti007.png) | ![](./screenshots/yeti008.png) |