Bugfix/normalize core comparisons (and Python 3 update fixes) (#952)

* Correct implementation of comparisons to be Pythonic

If a comparison cannot be made return NotImplemented, this allows the
Python interpreter to try other comparisons (eg __ieq__) and either
return False (in the case of __eq__) or raise a TypeError
exception (eg in the case of __lt__).

* Python 3 updates

* Add a more helpful message in exception if platform is not defined

* Added a basic pre-commit check

setup.py

@@ -50,7 +50,6 @@ CLASSIFIERS = [
     'Intended Audience :: End Users/Desktop',
     'License :: OSI Approved :: MIT License',
     'Programming Language :: C++',
-    'Programming Language :: Python :: 2',
     'Programming Language :: Python :: 3',
     'Topic :: Home Automation',
 ]