Use EPUB3MetadataSetTitle in the EPUB3CopyMetadata function.
Use EPUB3MetadataSetTitle in the EPUB3CopyMetadata function.

This was just an oversight from when I refactored the EPUB3CopyMetadata
function. See why we need tests. :)

MedallionMediaGroup/EPUB3Processor,MedallionMediaGroup/EPUB3Processor,MedallionMediaGroup/EPUB3Processor,MedallionMediaGroup/EPUB3Processor