Optionally place first few pieces

[Benjam Welker]

When a game starts, it's often tedious to place the first 6-8 pieces. Add an option that will allow the game to randomly place the first 6-8 pieces.

When placing, make sure not to create a winner, but more importantly, make sure to leave a valid move that doesn't end in an instant win. Also make sure not to fill any matching set, like rows, columns, diagonals, squares, etc. which may be difficult, and might have to have some leeway, especially with more matching options.