Updated README.rst
Updated README.rst

added the information about uwsgi emperor service and vassals configuration

morsik/uwsgi-formula,sunpowered-salt-formulas/uwsgi-formula,saltstack-formulas/uwsgi-formula,lgunsch/uwsgi-formula,typecode/uwsgi-formula,gadventures/uwsgi-formula,alexhayes/uwsgi-formula