Adds and uses a modified_by property in models/work.py This property is used to display the user who last edited the work in the document viewer. Fixes author being set on every edit. Also edited the style-sheet to fix issue i128. Patch by: Lennard de Rijk

# This module is DEPRECATED!
#
# You should no longer be using django.template_loader.
#
# Use django.template.loader instead.

from django.template.loader import *