try to move package list into setup.cfg again

setup.cfg

@@ -31,6 +31,12 @@ classifier =
 install_requires =
     psutil
 python_requires = !=2.7.*,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*
+packages = find:
+
+[options.packages.find]
+exclude =
+    docs
+    tests
 
 [options.extras_require]
 HTTPJSONSource = requests

setup.py

-from setuptools import setup, find_packages
+from setuptools import setup
 from satella import __version__
 
 
-setup(packages=find_packages(include=['satella', 'satella.*']),
-      version=__version__)
+setup(version=__version__)