__init__.py not installed

[draganHR]

__init__.py is missing after installing supervisor.
Issue occures when installing latest and old versions.

# pip install supervisor
...
# find  /usr/lib/python2.6/site-packages/supervisor -name __init__.py
/usr/lib/python2.6/site-packages/supervisor/medusa/__init__.py
/usr/lib/python2.6/site-packages/supervisor/tests/__init__.py

[mnaberez]

Supervisor 3.x is a namespace package. This was changed in 98c5676 on the master branch. Supervisor 4.0 will not be a namespace package.