4.0.0

Rewrite library (a070ad0 and b64f512)

• Rewritten interface designed for ease of use when creating, using, and combining processors;
• Simpler inheritance mechanism;
• Concrete and abstract interfaces;
• Streaming interface;
• Proper data management;
• Remove need for tree and namespace on file;
• Remove need for name of syntax tree;
• Allow transformers to provide new trees and files,
  not just modify them.