fix: each BingoBoard was missing one of the words, which are not on the board.

create_bingofields skipped one Word, because the start index for the
Words not on the BingoBoard was 25, but the middle word is not counted,
so there are only 24 Word BingoFields and 1 middle Word BingoField.
Merge tag 'v1.2.1'

version 1.2.1

Conflicts:
	ChangeLog
	setup.py