Version on PyPi does not match any commit

[sndrtj]

The most recent version of fuzzyset on pypi does not match any commit.

As of March 5 of this year, version 0.19.0 is the most recent version on PyPi. This seems to be one patch version ahead of the most recent commit on master, which bumped the version to 0.0.18.

Running a diff shows the PyPI version contains a difference on the _distance function of both cFuzzySet and fuzzySet (as well as a large difference in the .C file, but that may simply be a result of re-running cython).

Version 0.19.0 seems to introduce a performance regression due to recomputing the levenshtein distance twice in the fuzzySet implementation. Specifically, _distance function now reads:

 def _distance(str1, str2):
     distance = Levenshtein.distance(str1, str2)
     result = Levenshtein.distance(str1, str2)
     if len(str1) > len(str2):
         return 1 - float(distance) / len(str1)
     else:
         return 1 - float(distance) / len(str2)