Add package url in setup.py
Add package url in setup.py

It's useful to link from the pypi page to github
nikolas/splinter,drptbl/splinter,cobrateam/splinter,bmcculley/splinter,objarni/splinter,nikolas/splinter,gjvis/splinter,gjvis/splinter,drptbl/splinter,cobrateam/splinter,myself659/splinter,nikolas/splinter,underdogio/splinter,drptbl/splinter,myself659/splinter,objarni/splinter,underdogio/splinter,cobrateam/splinter,underdogio/splinter,bmcculley/splinter,bmcculley/splinter,objarni/splinter,myself659/splinter,gjvis/splinter