mudpy

Rather than keeping other improvements from going in while the new data format is under development, I’m treating that as a separate branch and continuing on the existing codebase in parallel for now. A new style guide has been added, and the code itself improved to meet it. Highlights:

• reformatted with three-space tabstops
• all lines wrapped to fewer than 80 characters
• modules imported within the objects requiring them
• replaced the previously included カタルシス // Katarsis data with a much smaller, simplified sample dataset