Ensure __doc__ is set at the top to make sure description is set on PyPI

Author: bennuttall

setup.py

@@ -1,11 +1,11 @@
+"A simple interface to GPIO devices with Raspberry Pi."
+
 import io
 import os
 import sys
 import errno
 from setuptools import setup, find_packages
 
-"A simple interface to GPIO devices with Raspberry Pi."
-
 if sys.version_info[0] == 2:
     if not sys.version_info >= (2, 7):
         raise ValueError('This package requires Python 2.7 or above')