Update/fix setup.py a bit, these are minor tweaks

Author: dpryan79

setup.py

@@ -33,7 +33,8 @@
        description = 'A package for accessing 2bit files using lib2bit',
        author = "Devon P. Ryan",
        author_email = "ryan@ie-freiburg.mpg.de",
-       url = "https://github.com/dpryan79/pyBigWig",
+       url = "https://github.com/dpryan79/py2bit",
+       license = "MIT",
        download_url = "https://github.com/dpryan79/py2bit/tarball/0.1.0",
        keywords = ["bioinformatics", "2bit"],
        classifier = ["Development Status :: 5 - Production/Stable",