0.6    2014-06-08
    - Updated for recent tx error hash change.
    - Fixed bug tracker url.
0.5    2013-12-20
    - Fix private method call

0.4    2011-12-30 22:16:00
    - Support blocking mode for running outside of IOLoop.

0.3    2011-05-11 11:30:005-11 
    - Stop using deprecated method

0.2    2010-12-14 09:01:00

    - Update to use async fetching if available 

0.1    2010-12-13 20:27:00

    - Initial release