ENH: Smaller test dataset (320MB)

We'll see if Travis can actually run this. I have a bad feeling that, with all the additional tests that will be run, we will exceed the ~50-minute limit.
mention I think errorneous ```[2]``` there -- should be ```[1]``` and better anyways altogether may be for the logic, e.g. ```sys.version_info > (2, 6)``` or then comparison piece by piece makes less sense