Changed setup.py to prevent tests being included in distribution

Author: domdfcoding

setup.py

@@ -18,7 +18,7 @@
        license            = license,
        long_description   = long_description,
        name               = modname,
-       packages           = find_packages(),
+       packages           = find_packages(exclude=("tests",)),
        py_modules         = py_modules,
        url                = web,
        version            = VERSION)