v0.1.0, date 18/2/2013 -- Initial release
v0.1.1, date 20/2/2013 -- Less stateful design
v0.1.1, date 22/2/2013 -- Doc bugfix
v0.1.2, date 23/2/2013 -- Better test hashes, better support for extension
v0.1.3, date 15/3/2013 -- Duplicate class-name bugfix, Python 2/3 coexistance bugfix
