Added User welcome message.
Added templates/soc/mail/welcome.html as a template for the message.
Also fixed a cyclic import that was about to happen in notifications.py.
#!/bin/sh
NOSE_WITH_DOCTEST=t
export NOSE_WITH_DOCTEST
NOSE_DOCTEST_EXTENSION=txt
export NOSE_DOCTEST_EXTENSION
#NOSE_DETAILED_ERRORS=t
#export NOSE_DETAILED_ERRORS
nosetests $*