Fix issue #72 - unique flag is not being evaluated for attributes.
change tl_metamodel_rendersetting to DC_General (see #105).
Change table tl_metamodel_filter to DC_General (see #105).
tl_metamodel_filtersetting changed to DC_General (see issue #105)
Add breadcrumb callback class for DC_General.
reworked tl_metamodel_filtersetting.php for DC_General parent<->child filtering
Merge branch 'master' into paste_callback
Next step in paste into and paste after handling with DC_General.