* Added support for passing collections to/from RNA functions, this is done using a ListBase of CollectionPointerLink, which is a standard ListBase link + PointerRNA. * Added editable active uv/vcol layer to Mesh. * Armature.bones now includes all bones, not only the ones without parents. * Modifier UV layer fields now are allowed to be empty, previously this would set the name during modifier evaluation if there was none.