Track file getItemIdandItemInContext.xsl
Change id to ItemID in item-in-context search
Refine original filename processing

Ignore item_-_MODS_-_Notes_ elements in the remediated metadata
file that contains "Original filename: "; we will get this information
from the OriginalFileLoadedIntoOmeka_ element.
Process said OriginalFileLoadedIntoOmeka_ element. One <note>
per OriginalFileLoadedIntoOmeka_ element (i.e. one <note> per
filename, this is preferred because it is easier to parse.