0.13 Tue Aug  5 2014 Pavel Shaydo <zwon@cpan.org>
    - add filter attribute to EventStream
0.12 Thu Jul 24 2014 Pavel Shaydo <zwon@cpan.org>
    - change the place from which window_update is called when event is
      added. This affects aggregators with mixed count/duration windows
    - improve Statistics::Continuous aggregator
0.11 Wed Jul 23 2014 Pavel Shaydo <zwon@cpan.org>
    - documentation improvements
0.10 Sun Jul 13 2014 Pavel Shaydo <zwon@cpan.org>
    - minor test refactoring
    - added link to gh-pages as home page
0.09 Thu Jun 26 2014 Pavel Shaydo <zwon@cpan.org>
    - significant performance improvements
    - get_event(0) now returns oldest event in the window
    - iterator now iterates from oldest event to most recent
    - renamed statistics aggregators
0.08 Sun Jun 15 2014 Pavel Shaydo <zwon@cpan.org>
    - remove shift option for aggregators
    - add disposable aggregators
0.07 Wed Jun 11 2014 Pavel Shaydo <zwon@cpan.org>
    - fix failing test
0.06 Wed Jun 11 2014 Pavel Shaydo <zwon@cpan.org>
    - add aggregators for calculation of sample based and time weighted statistics
    - add get_iterator method to Window
    - add next_leave method to EventStream
    - refactor tests
    - add simple benchmarking script
0.05 Thu May 22 2014 Pavel Shaydo <zwon@cpan.org>
    - remove type parameter from aggregators
    - automatically update model time when event added
    - support aggregators limited by count and duration at the same time
    - update time window for count aggregators
0.04 Tue May 20 2014 Pavel Shaydo <zwon@cpan.org>
    - implement batch mode for time aggregators
    - require perl 5.10
0.03 Sun May 18 2014 Pavel Shaydo <zwon@cpan.org>
    - completely reworked version
0.02 Mon Apr  7 2014 Pavel Shaydo <zwon@cpan.org>
    - fix dependencies
0.01 Sun Apr  6 2014 Pavel Shaydo <zwon@cpan.org>
    - First version, released on an unsuspecting world.