Merge pull request #7 from brentru/pypi

add install instructions to README, enable setup.py

Author: brentru

README.rst

@@ -30,7 +30,6 @@ This is easily achieved by downloading
 
 Installing from PyPI
 =====================
-
 On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
 PyPI <https://pypi.org/project/adafruit-circuitpython-rsa/>`_. To install for current user: