cannot pip install
because of our convoluted installation script, there are packages that a user must have installed before they can pip-install wetb.
in particular: future, numpy, and cython are required, and pypandoc is desired but not required.
either we fix our installation script (MAJOR BONUS POINTS FOR A CYTHON-FREE VERSION) or we update our installation instructions.
also one of our tests should verify that wetb can install cleanly.