Remove duplicates from supporters list
Remove duplicates from supporters list

The source spreadsheet has a few instances of double-submissions. We can
eliminate the duplicates by making the supporter array unique.

freebassel/freebassel.org,freebassel/freebassel.org,Fabricatorz/freebassel.org,Fabricatorz/freebassel.org,freebassel/freebassel.org,Fabricatorz/freebassel.org