Bump to 0.0.5

* Remove group_counts region metadata
* group_buckets now also use strategy tracks
* Automatic group_counts["total"] sums counts across regions per track
* Automatic group_counts["total"]["default"] stores sum of all tracks
  over all regions
* Strategy evaluation function accepts keyword arguments
* Fixed bug where it was not possible to use the "median" in _filter
* Created NucleotideCounterStrategy with a view to replace NCounterStrategy
* Added an improved regression test suite
* Added tests for exclusion properties
Bump