Merge pull request #166 from choldgraf/add_python_version_check

Added a check for python 3

Author: SamLau95

setup.py

@@ -3,6 +3,8 @@
 from setuptools.command.test import test as TestCommand
 
 
+if sys.version_info < (3, 0):
+    raise ValueError('This package requires python >= 3.0')
 
 with open('requirements.txt') as fid:
     install_requires = [l.strip() for l in fid.readlines() if l]