DOC: adding classifiers and fix urls

Author: bsipocz

setup.cfg

@@ -4,10 +4,21 @@ version = 0.4.7.dev
 description = Functions and classes to access online astronomical data resources
 author = The Astroquery Developers
 license = BSD
-url = http://astropy.org/astroquery
+project_urls =
+    Source = https://github.com/astropy/astroquery
+    Documentation = https://astroquery.readthedocs.io
 edit_on_github = False
 github_project = astropy/astroquery
-
+classifiers =
+    Intended Audience :: Science/Research
+    License :: OSI Approved :: BSD License
+    Operating System :: OS Independent
+    Programming Language :: Python
+    Programming Language :: Python :: 3
+    Topic :: Database
+    Topic :: Scientific/Engineering :: Astronomy
+    Topic :: Software Development :: Libraries
+    License :: OSI Approved :: BSD License
 
 [build_docs]
 source-dir = docs