Repos not being found on Travis

[asmeurer]

$PYTHONPATH=. python -m doctr configure --no-upload
Warning, The following options in `.travis.yml` were not recognized:
{
  "lubalubadubdub": false
}
Welcome to Doctr.

We need to ask you a few questions to get you on your way to automatically
deploying from Travis CI to GitHub pages.

What repo do you want to build the docs for [drdoctr/doctr]? sympy/sympy

------------------"sympy/sympy" not found on travis-------------------

I haven't yet figured out what is going on.

[asmeurer]

Don't know why it stopped working, but it looks like the API v3 works. Fix at #298.