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
# Until model subclassing is a possibility, a mixin class is used to add
# the necessary functions that may be contributed for geographic objects.
class GeoMixin:
"""
The Geographic Mixin class provides routines for geographic objects,
however, it is no longer necessary, since all of its previous functions
may now be accessed via the GeometryProxy. This mixin is only provided
for backwards-compatibility purposes, and will be eventually removed
(unless the need arises again).
"""
pass