1.4 release

Secret key support and other changes.

1.3 release tag

Lots of touchups, fixes, and improvements

* Ascii-armor parsing improvements
* Much more test coverage using new pieces of test data
* Massive performance increase (6x-15x) when parsing lots of data, such as a
  full public keyring
* Cleanup of type/algorithm lookup dictionaries
* datetime changes, 'datetime' attribute is deprecated, use 'creation_time'
  instead; 'expiration_time' is now also available for signatures

A few more minor improvements

Might as well call this 1.0

minor release

First release to PyPi