Corrected README filename in setup.py
Corrected README filename in setup.py

ntucker/django-announcements,arthur-wsw/pinax-announcements,arthur-wsw/pinax-announcements,datafyit/django-announcements,rizumu/django-announcements,pinax/django-announcements,datafyit/django-announcements,pinax/django-announcements,percipient/django-announcements,percipient/django-announcements,rizumu/django-announcements,pinax/pinax-announcements,ntucker/django-announcements