xdot can be installed on python 2.7 through pip (but it doesn't work)

[jrfonseca]

xdot can be installed on python 2.7 through pip (but it doesn't work)

[ppolewicz]

Also, installation on Ubuntu now is simply sudo apt-get install xdot

[jrfonseca]

'classifiers' should be set in setup.py

Fixed. Thanks!

Also, dependency from gi and gi-cairo should be added so installation via pip is easier.

I don't thing that installing gi and gi-cairo via pip works reliably, neither on Linux neither on Windows. It doesn't work for me at least

installation on Ubuntu now is simply sudo apt-get install xdot

Right. But I don't want to clutter the README with instructions of how to install xdot using every Linux distro out there. I presume that people are confortable searching and installing packages using whatever Linux distro of their choice.