Replace disutils for setuptools

Author: pabluk

setup.cfg

@@ -0,0 +1,2 @@
+[bdist_wheel]
+universal=1

setup.py

@@ -1,4 +1,4 @@
-from distutils.core import setup
+from setuptools import setup
 
 
 with open('README.rst') as file:
@@ -13,16 +13,26 @@
       license='GNU General Public License v3 (GPLv3)',
       description='A library that provides a Python 3 interface for the Gravatar API.',
       long_description=long_description,
+      long_description_content_type='text/x-rst',
+      keywords='gravatar',
       packages=['libgravatar'],
-      provides=['libgravatar (0.2.3)'],
       classifiers=[
         'Development Status :: 4 - Beta',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
         'Operating System :: OS Independent',
+        'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.2',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Topic :: Software Development :: Libraries',
       ],
+      project_urls={
+        'Bug Reports': 'https://github.com/pabluk/libgravatar/issues',
+        'Source': 'https://github.com/pabluk/libgravatar',
+        'Documentation': 'https://libgravatar.readthedocs.io',
+      },
 )