Update README.md

Author: jakob-beetz

README.md

@@ -1,11 +1,13 @@
 # IfcOpenShell Scripting Tutorial 
 
-![Viewer screenshot](img/rwth_viewer_screen_shot.png)
+![Viewer screenshot](img/rwth_ifc_viewer.png)
 
-This repository contains tutorial to learn scripting your own applications for processing Industry Foundation Classes (IFC) files. It is based on a scriptable viewer tool that uses the [IfcOpenShell](http://ifcopenshell.org) toolkit. The scriptable viewer tool has been created for teaching purposes and is used at the [Eindhoven University at Technology](https://www.isbe.tue.nl) and the [RWTH Aachen University](http://caad.arch.rwth-aachen.de) .  
+This repository contains tutorial to learn scripting your own applications for processing Industry Foundation Classes (IFC) files. It is based on a scriptable viewer tool that uses the [IfcOpenShell](http://ifcopenshell.org) toolkit. The scriptable viewer tool has been created for teaching purposes and is used at the [Eindhoven University at Technology](https://www.isbe.tue.nl) and the [RWTH Aachen University](http://dc.rwth-aachen.de) .  
 
 A packaged __binary version of the tool__ is available at [this location]( http://caad.arch.rwth-aachen.de/download/rwth_viewer.zip )(175 MB!) to get you started. It comes with "all batteries included", including python, IfcOpenShell and the Python OpenCascade wrappers.
 
+The package includes alls necessary source code to extend, modify, reuse the scripting viewer to your liking.
+
 Follow these simple steps to 'install' the viewer/scripting application:
 
   - Download tue_viewer.zip (175 MB) and the [snippets configuration file](https://raw.githubusercontent.com/jakob-beetz/IfcOpenShellScriptingTutorial/master/src/snippets.conf) which contains a few example snippets to get you started.