Version 2.1.1

• Ensure all popup dialogs (messages, file chooser, etc.) open in the Event Dispatcher Thread so it doesn't freeze the UI (see Issue #1).
• Update to Greenfoot 2.4.0.
• Specify last instantiated world in greenfot.project for scenarios using GameScreen class as world.

2.1.0

• The master for all tutorials/worksheets is now in HTML instead of Word. The HTML is on the code.makery.ch website. The converted worksheets can still be downloaded as Word files from that website.
• Remove Word and PowerPoint files from GitHub repository.
• Change numbering of scenarios/tasks. Now we have 1.01 for the first scenario of chapter one, 1.02 for the second scenario, etc.