Merge tag 'sparks-1.6.5' into develop

1.6.5
Don't fail if user doesn't have a `git pushall` alias.
add unicorn to default requirements file.
Add default configuration files and templates for gunicorn/supervisor.
django fabfile implementation for gunicorn & supervisor configuration file upload / reload.
Add comments in fabric tasks so that they are understandable, more than just their name.
README updates.
bump version in setup.py
Merge branch 'release/1.6.6'