jamescasbon/PyVCF — pull request #133 by martijnvermaat (2013-12-03 12:33:00+00:00)
Title: Add dependency on collections.Counter implementation for Python 2.6

As per my suggestion in PR jamescasbon#131, defaultdict(int) was changed to Counter(). However, I didn't realize it was only added in Python 2.7 and we target Python 2.6.

This approach follows what we already did for collections.OrderedDict.

@jamescasbon, do you agree?