Added Variant #178

Variant #178: Windmill

A rather unique variant with a center foundation that is built upwards until it holds 52 cards, along with 4 corner foundations that are build down from King to Ace.

Difficulty rating adjustments

• American Toad: Changed difficulty rating from Medium to Easy

• Carpet: Changed difficulty rating from Medium to Easy

• Castles in Spain: Changed difficulty rating from Medium to Easy

• Chessboard: Changed difficulty rating from Medium to Very Hard

• Demon Fan: Changed difficulty rating from Medium to Very Easy

• Dieppe: Changed diffiiculty rating from Easy to Very Easy

• Diplomat: Changed difficulty rating from Hard to Medium

• Scorpion II: Changed difficulty rating from Hard to Very Hard

• Tabby Cat: Changed difficulty rating from Medium to Hard

• Thirteens: Changed difficulty rating from Medium to Easy

• Three Cells: Changed difficulty rating from Medium to Hard

• Tournament: Changed difficulty rating from Medium to Very Hard

• Vertical: Changed difficulty rating from Hard to Medium

• Whitehead: Changed difficulty rating from Medium to Easy