Add classifiers for Python 3
Add classifiers for Python 3

jmcarp/sandman,beni55/sandman,webwlsong/sandman,jmcarp/sandman,webwlsong/sandman,jeffknupp/sandman,jmcarp/sandman,aprilcs/sandman,jeffknupp/sandman,webwlsong/sandman,aprilcs/sandman,beni55/sandman,beni55/sandman,jeffknupp/sandman,aprilcs/sandman