Add python_requires to leverage pypi search (#242)
Add python_requires to leverage pypi search (#242)

* Add python_requires to leverage pypi search

Installing `whitenoise` in a py27 project (I know it'll be deprecated, :disappointed: ) made me install an unsupported version, the `5`.
In order to avoid such behaviour it's advisable to specify the python version required by the build in the setup.py file.
https://packaging.python.org/guides/distributing-packages-using-setuptools/#python-requires

* single to double quote

evansd/whitenoise,evansd/whitenoise,evansd/whitenoise