Make the wsgi module a true WSGI endpoint.
Add an entrypoint to have hospital_serve commands directly.
Document hospital_serve.
Put back everything into the wsgi.py file.
Add documentation about all this.
Refs #44 - Reviewed documentation about running WSGI service. Removed 'hospital_serve' script from entry points.
Refs #44 - Updated changelog.
hospital.wsgi.application is a WSGI endpoint. Closes #44.