Split edit and create into different methods
This makes removes unneeded responsibility from the edit view and
makes it possible to more tightly restrict the usage of the edit and
create views to only creating/editing.
Patch by: Sverre Rabbelier
# 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