0.2 October 30th, 2005 Ruby on Rails integration

As promised I have now included my first version of ActiveCrypto the crypto layer for ActiveRecord and Ruby on Rails.

0.1.1 August 27, 2005 Minor fixes

Thanks to Jason Vasquez mugatu at mugfu dot com for noticing that Key#to_s
called the nonexistent encoded method. 

I also made a few slight changes to the documentation.