Stop pushing coverage information to Coveralls from Travis CI, as we don't test the `io` modules there.
Stop pushing coverage information to Coveralls from Travis CI, as we don't test the `io` modules there.

Now Coveralls gets coverage information only from CircleCI

rgerkin/python-neo,samuelgarcia/python-neo,apdavison/python-neo,NeuralEnsemble/python-neo,JuliaSprenger/python-neo,INM-6/python-neo