Pass USFM marker behaviors through UpdateBlock metadata #206
Description
Currently, the PlaceMarkersUsfmUpdateBlockHandler relies on the marked_for_removal property of UpdateBlockElements to determine whether or not they should be placed, but that is not always adequate.
In the case where we do not want to place paragraph markers but there is a mid-verse header, the paragraph marker following said header is placed anyways, since it must be kept for the header to end in the right place. Explicitly knowing the marker placement settings would resolve this.
This will also allow us to have more options, such as "strip", "preserve", and "end" for paragraph markers.