Merge branch 'debian' into debian-release

* debian:
  actually doing arith operation and printing to avoid failed comparison
  Changelog for all previous commits
  adding a workaround to allow BFS (Closes: #588595)
  make nosetesting not suppressing output from code
  Build-Depend on python-numpy providing numpy-ext (Closes: #589590) + policy 3.9.0
  Added deb_cython_0.12.1 to use code cythoned with up-to-date cython 0.12.1