Remove python 2.7 support from setup files

Author: madzak

setup.cfg

@@ -2,4 +2,4 @@
 # This flag says that the code is written to work on both Python 2 and Python
 # 3. If at all possible, it is good practice to do this. If you cannot, you
 # will need to generate wheels for each Python version that you support.
-universal=1
+python-tag=py34

setup.py

@@ -12,16 +12,14 @@
     package_dir={'': 'src'},
     packages=find_packages("src", exclude="tests"),
     # https://packaging.python.org/guides/distributing-packages-using-setuptools/#python-requires
-    python_requires='>=2.7',
+    python_requires='>=3.4',
     test_suite="tests.tests",
     classifiers=[
         'Development Status :: 3 - Alpha',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',