NX endorses spec7 - Seeding Pseudo-Random Number Generation (#356)

We are still discussing this SPEC and decided to open this PR to have a
place where we can make comments and vote. We will leave this PR open
for a week or two.

Co-authored-by: Brigitta Sipőcz <bsipocz@gmail.com>

Author: jarrodmillman

spec-0007/index.md

@@ -9,6 +9,7 @@ author:
   - "Matt Haberland <mhaberla@calpoly.edu>"
 endorsed-by:
   - ipython
+  - networkx
   - numpy
   - scikit-image
   - scipy