hopefully fix python 2 and 3 compatability

setup.py

@@ -1,4 +1,11 @@
-from distutils.core import setup
+from setuptools import setup
+import unittest
+
+def pyaccuwage_tests():
+    test_loader = unittest.TestLoader()
+    test_suite = test_loader.discover('tests', pattern='test_*.py')
+    return test_suite
+
 setup(name='pyaccuwage',
     version='0.2018.1',
     packages=['pyaccuwage'],
@@ -9,4 +16,5 @@ setup(name='pyaccuwage',
 		'scripts/pyaccuwage-genfieldfill'
 		],
     zip_safe=True,
+    test_suite='setup.pyaccuwage_tests',
     )