'mat' is not easily pip installable

Currently, one must run 'pip install git+https://git.torproject.org/user/jvoisin/mat.git@af36529554c39a2eefcc2' or something along those lines. This is not ideal for distribution purposes, particularly on operating systems without a packaged version.

Making anonymity/security easy is a big deal, as Snowden et al have demonstrated.