Add missing "unofficial" units to parks table

After cross-referencing the parks table in our boundaries database with the list of park units on inside.nps.gov, I have a list of "unofficial" units that are missing from our database. For some of these, there may be reason to keep them out of our database, but I believe most if not all should at least have a record in our parks table regardless of whether or not we have a valid polygon boundary. They can be marked as public = false if we're not ready to share them, but at least we'll know they exist so we can consider how to handle them.

I've separated them into groups based on designation.

Monuments & Memorials

[ ] Father Marquette National Memorial, FAMA (unit code url redirects nowhere. Old nps page here.
[ ] John Ericsson National Memorial, JOER (subunit of NAMA, at https://www.nps.gov/nama/planyourvisit/john-ericsson-memorial.htm)
[ ] Cape Henry Memorial, CAME
[ ] George Mason Memorial, GEMM (subunit of NAMA at www.nps.gov/nama/planyourvisit/George-Mason-Memorial.htm
[ ] U.S.S Arizona Memorial, USAR (url redirects to VALR)

National Cemeteries

[ ] Battleground National Cemetery, BATT
[ ] Fort Donelson National Cemetery, FDNC
[ ] Fredericksburg National Cemetery, FRED
[ ] Gettysburg National Cemetery, GETC
[ ] Poplar Grove National Cemetery, POGR
[ ] Shiloh National Cemetery, SHNC
[ ] Stones River National Cemetery, SRNC
[ ] Vicksburg National Cemetery, VINC

National Heritage Areas and Corridors

[x] Cane River National Heritage Area, CRHA
[x] Essex National Heritage Area, ESSE
[ ] Niagara Falls National Heritage Area, NIFA
[x] Delaware & Lehigh National Heritage Corridor, DELE
[x] Erie Canalway National Heritage Corridor, ERIE
[ ] Illinois & Michigan Canal National Heritage Corridor, ILMI
[x] Quinebaug & Shetucket Rivers Valley National Heritage Corridor, QUSH

Miscellaneous

[ ] Deshler-Morris House, DEMO (a.k.a Germantown White House, part of INDE, website here.
[x] Maine Acadian Culture, MAAC
[ ] New Jersey Coastal Heritage Trail Route, NEJE (redirects to PINE)
[ ] Peirce Mill, PIMI (redirects to https://www.nps.gov/places/peirce-mill.htm. Also part of Rock Creek Park)
[ ] The Old Stone House, OLST (redirects to https://www.nps.gov/places/old-stone-house.htm. Also part of Rock Creek Park)
[x] Chesapeake Bay Gateways Network, CBPO (redirects to CHBA. Also, just called "Chesapeake Bay")
[ ] Chesapeake Bay Gateways and Watertrails Network, CBGN (somehow, this is different than Chesapeake Bay. It has a different website)

nationalparkservice / places-data

Add missing "unofficial" units to parks table #744