GC78 Ice Cream Party

Replaces the text 'General Convention' with 'Ice Cream Party'.

This extension provides relief to beleaguered Episcopalians who are overwhelmed by General Convention, or at least, need a laugh out of it. Let's have an Ice Cream party instead! (Much credit and thanks to Eric Bailey, who wrote the "Millennials to Snake People" extension, for making this very easy coding, by sharing his code publicly and freely licensing that work.)