update package metadata: maintainer, repo url, python version classif…

…iers

sha256 sums:
a97d7cc66d997b4ac491f0e8068eb324790994834951a9beb5a4619835b361d9  dist/dlinfo-1.2.1-py3-none-any.whl
5f6f43b47f3aa5fe12bd347cf536dc8fca6068c61a0a260e408bec7f6eb4bd38  dist/dlinfo-1.2.1.tar.gz

2019-11-05

setup.py: added metadata

DLInfo.path