Remove not used imports in models. Fix missing spaces in models when operator not preceded by a space. Add missing ugettext_lazy import to Proposal model. Patch by: Pawel Solyga Review 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 $*