Switching the `urls` property to use `git remote show` instead of `git remote get-url`
Switching the `urls` property to use `git remote show` instead of `git remote get-url`

`get-url` is a new API that is not widely available yet (introduced in git 2.7.0), and
provokes failure on travis.

Signed-off-by: Guyzmo <3d305ad602b1516be69a596ef9c3df266f23d6f4@m0g.net>

expobrain/GitPython,breavo/GitPython,gitpython-developers/GitPython,gitpython-developers/gitpython,breavo/GitPython,gitpython-developers/gitpython,expobrain/GitPython,nvie/GitPython,jeblair/GitPython,gitpython-developers/GitPython,nvie/GitPython,jeblair/GitPython