Add cogs to setup.py

I forgot, this will also be needed to make a dist.

setup.py

@@ -3,7 +3,7 @@ from distutils.core import setup
 setup(
     name='Geoffrey',
     version=__import__('geoffrey').__version__,
-    packages=['geoffrey'],
+    packages=['geoffrey', 'geoffrey.cogs'],
     install_requires=['discord.py', 'SQLAlchemy', 'pymysql', 'requests'],
     long_description=open('README.txt').read(),
 )