Added

• Prefs sheet now appears by default on first launch.
• Help menu now opens README.md in default web browser. (#57)
• Added license header to each source file.

Changed

• The app now displays the raw script output, including all warnings, reminders, and errors.
• Selecting a given recipe type in the preferences window (or --config prompts) now automatically selects its required parent recipe types.
• Changed readme to point to the version of recipe-robot Python script embedded in the Recipe Robot app.
• Code simplification and refactoring.

Fixed

• Adjusted layout of Mac app.