0.5:
    - Fixed - locking issue with JSON output files
    - Fixed - EventCounter did not respond to events keyword argument

0.4:
    - added a patcher util class to allow injecting events to existing libraries/code.
    - decoupled counter names from the names of events they count. Still, by default a counter will count events with
      it's name
    - shortcut decorators now take the name of the function they wrap as a default event name
    - Added a role option to multi process reporting initializations.
    - Made all report_* and shortcuts decorators usable as context managers.
    - Munin plugin now ignores old reports by default
    - Counters which doesn't have any value now return None instead of 0.
    - Fixed an issue with aggregation of average values when not all sources had the same value
    - Added output_report() to allow manual initiation of reports.


0.3:
    - Added a manifest.in file, so that CHANGES.txt will come along.

0.2:
    - Added multiprocess support.
    - Extended EventLogger to allow regex based filtering of events it logs.
    - Added JSONFileReporter to output reports in JSON format
    - Added a utility to faciliate writing Munin plugins

0.1:
    - Initial Release