added new exercise to statd, speed_solutions.ipynb
Merge pull request #11 from sanguineturtle/master

Basic setup for housing tests ...
fixed docstrings on asset_pricing, career, compute_fp
fixed docstrings in career, compute_fp, discrete_rv, ecdf, estspec, ifp
edited docstrings on asset_pricing, jv, kalman
cleaned up docstring of lae.py