Chasing the Platypus! - Restructured Plugin Implementation to Use More Abstraction

What is happening in the development of Platypus.

Platypus is the free, comprehensive, and easy to use page-layout and typesetting system available at http://platypus.pz.org

Restructured Plugin Implementation to Use More Abstraction

Commands are now generally abstract classes from which plugins derive their own concrete implementations. This design idea, from Atul Khot, should save a lot of duplication of code.