Pymta

- Compatibility fixes for Python 2.3-2.6
- Policies can drop connection to the client before or after the response
- CommandParser is more robust against various socket errors
- Better infrastructure and documentation to use pymta in third-party tests

- Fixed bug which caused hang after unexpected connection drop by client

- Switch to process-based architecture, got rid of asyncore
- Support for size-limitations of messages, huge messages will not be stored in
memory if they will be rejected anyway (denial of service prevention)
- API documentation is now auto-generated
- Renamed DefaultMTAPolicy to IMTAPolicy and moved all interfaces to pymta.api
- Added the debugging_server as an extremely simple example of a pymta-based
server

- wrote documentation
- bug fixes
- multiple messages in one SMTP transaction
- transparency support for lines in the message starting with a dot

- initial release