py3k map returns a lazy sequence, not a list

We need to eagerly evaluate the list of dependencies for Python 3.
Conda install SciPy on Travis

We can't `pip install scipy` on Travis in any sane amount of time, and
half the time the virts don't have BLAS available anyways. Preinstall
with conda instead.
Use correct path for miniconda py3k

The py3k-specific version of miniconda installs to a different location.

Do we even need to use this version? AFAIK, the latest miniconda works
for Python 2.x and 3.x.