setup.py: Fill out useful package information

- Specify license attribute and license through classifiers
- Various other classifiers
- Add pyopengl as a dependecy
- Specify the long_description content type so it is renderd correctly on external sites
- Basic keywords

Author: einarf

setup.py

@@ -7,6 +7,29 @@
     author ='Jon Wright',
     author_email = 'jonathan.wright@gmail.com',
     url = 'http://github.com/jonwright/pyopengltk',
-    py_modules=['pyopengltk'],
+    license='MIT',
+    description="An opengl frame for pyopengl-tkinter based on ctype",
     long_description=open('README.md').read(),
+    long_description_content_type='text/markdown',
+    py_modules=['pyopengltk'],
+    install_requires=[
+        'pyopengl',
+    ],
+    keywords=['opengl', 'window', 'context', 'tk', 'tkinter'],
+    classifiers=[
+        'License :: OSI Approved :: MIT License',
+        'Environment :: Win32 (MS Windows)',
+        'Environment :: X11 Applications',
+        'Intended Audience :: Developers',
+        'Topic :: Multimedia :: Graphics',
+        'Topic :: Multimedia :: Graphics :: 3D Rendering',
+        'Topic :: Scientific/Engineering :: Visualization',
+        'Topic :: Software Development :: Libraries :: Python Modules',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+    ]
 )