Making a new release

Find newest bioblend version.

edit the setup.py
requirements.txt, pin to the latest bioblend
HISTORY.rst
parsec/__init__.py

run make
check the git diff. Did it do anything odd?
git add docs/ parsec/ requirements.txt setup.py
git commit -m 'Release for bioblend 0.15.0'
git tag 1.15.0 # Note the 1! I screwed up the numbering earlier in the life of this package, we should have followed bioblend from the start, but I was not smart :( so now we bump the major version to bioblend's + 1.