Upgrade PyCrypto to to 2.6.1
Upgrade PyCrypto to to 2.6.1

PyCrypto 2.6.1 fixes a potentially serious issue in the CSPRNG [0].

If you already have your dev environment set up, you can simply `pip install -U
pycrypto`.

[0] http://lists.dlitz.net/pipermail/pycrypto/2013q4/000702.html

mark-in/securedrop-prov-upstream,mark-in/securedrop-prov-upstream,mark-in/securedrop-prov-upstream,mark-in/securedrop-prov-upstream