Add missing imports, remove unsused imports, fix too long lines and some other style fixes in soc.views.models.student_project module. Patch by: Pawel Solyga Reviewed by: to-be-reviewed

#!/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 $*