* lily/context-property.cc (make_item_from_properties):

* lily/context-property.cc (make_item_from_properties):
* lily/context.cc (add_context)[TWEAK]: Tweak registration behind
#ifdef.

* scm/define-context-properties.scm
(all-internal-translation-properties): Add tweakRank and tweakCount.

* lily/grob.cc:
* scm/define-grob-properties.scm (all-internal-grob-properties):
Add tweak-rank and tweak-count.