Stopped setup.py from packaging test submodules (#106)

@@ -6,6 +6,9 @@ History
 Pending
 -------
 
+* Fixed a packaging error which caused sub-packages of the tests to be
+  distributed.
+
 1.7.3 (2016-09-13)
 ------------------
 

@@ -38,7 +38,7 @@ setup(
         'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
     ],
-    packages=find_packages(exclude=['tests']),
+    packages=find_packages(exclude=['tests', 'tests.*']),
     include_package_data=True,
     test_suite='tests.runtests.main',
     install_requires=['Django>=1.7']