0.6 August 10th, 2006 Certified PKI release

Finally I have had a good reason http://www.tractis.com to add Digital Signature support to EzCrypto. We have support for RSA and DSA private and public keys as well as basic X509 certificate support. All in typical EzCrypto simple Ruby like methods.

KNOWN PROBLEM. The DSA Signer.public_key method has some sort of problem but will be fixed for 0.6.1.