included string_grouper_utils package specification in setup.py (#62)

Author: ParticularMiner

setup.py

@@ -10,7 +10,7 @@
 setup(
     name='string_grouper',
     version='0.5.0',
-    packages=['string_grouper'],
+    packages=['string_grouper', 'string_grouper_utils'],
     license='MIT License',
     description='String grouper contains functions to do string matching using TF-IDF and the cossine similarity. '
                 'Based on https://bergvca.github.io/2017/10/14/super-fast-string-matching.html',