``method_cache`` now accepts a cache_wrapper parameter, allowing for custom parameters to an ``lru_cache`` or an entirely different cache implementation.
Use ``backports.functools_lru_cache`` to provide ``lru_cache`` for Python 2.
1.5
===
Implement ``Throttler`` as a descriptor so it may be used to decorate methods. Introduces ``first_invoke`` function.
Fixed failure in Throttler on Python 2 due to improper use of integer division.
1.4
===
Added ``Throttler`` class from `irc <https://bitbucket.org/jaraco/irc>`_.