Changed postgresql DB backend so that it gives a helpful error message if people are using psycopg 2 instead of version 1
Changed postgresql DB backend so that it gives a helpful error message if people are using psycopg 2 instead of version 1

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%40109

adieu/django-nonrel,Belgabor/django,Belgabor/django,Belgabor/django,adieu/django-nonrel,adieu/django-nonrel