setup.py: Add some metadata

Author: 1st1

setup.py

@@ -55,6 +55,11 @@ def build_extensions(self):
 setup(
     name='uvloop',
     description='Fast implementation of asyncio event loop on top of libuv',
+    url='http://github.com/MagicStack/uvloop',
+    license='MIT',
+    author='Yury Selivanov',
+    author_email='[email protected]',
+    platforms=['*nix'],
     version='0.4.14',
     packages=['uvloop'],
     cmdclass={'build_ext': libuv_build_ext},