Made many changes to include executable archives into the chat tutorial
Made major changes to the chat tutorial. Python and the chat client will be installed using executable archives. The structure of the tutorial was changed to fit with this steps. Also the tutorial icon got updated
Made major changes to the chat tutorial. Python and the chat client will be installed using executable archives. The structure of the tutorial was changed to fit with this steps. Also the tutorial icon got updated
Merge pull request #533 from swuest/chat_tutorial_through_executable_archives

Changed the Chat tutorial to a Chat Tutorial via executable archives