nipy/dipy — pull request #474 by matthew-brett (2014-11-22 11:48:09+00:00)
Title: RF: switch travis tests to use virtualenvs

We were using a trick to get the dependencies on travis, working round their
virtualenv setup.

Now there is a usable travis wheel repository, we can use our own virtualenvs
and install all optional dependencies.

Also allows checking minimal dependencies, and Pythons 2.6 through 3.4.