Add mapping of Cul MODS Collection
Add processing of Additional Item Metadata : Provenance
Change 'mixed media' to 'mixed material'

In code handling the Item type, change "mixed media" to
"mixed material", which is the correct content value for a
typeOfResource.
Add processing of Additional Item Metadata : Spatial Coverage
Generate relatedItem element, content Omeka collection title.
Change name _createRelatedItemProject to _MapOmekaCollectionTitle
Add mapping of item file(s) mime type