Add url

setup.cfg

@@ -8,6 +8,7 @@ author = Simon Humpohl
 author_email = simon.humpohl@rwth-aachen.de
 license = GPLv3
 license_files = LICENSE
+url = https://git-ce.rwth-aachen.de/simon.humpohl/tabor_control
 keywords = hardware, awg, tabor, tabor electronics
 classifiers =
           Programming Language :: Python :: 3