OpenPGP 0.2.3

This is an attempt at implementing OpenPGP in Python. The primary focus is on flexibility with respect to packet information and message composition.

The jump from 0.1.4 to 0.2.3 reflects a major overhaul which produced some friendly string-based functions that are much nicer to work with than the ones requiring packet and message instances. The commandline demo now doubles as a tutorial of sorts for the string-based functions.

PyCrypto (http://www.amk.ca/python/code/crypto.html) is required.