Connect Four Updated

Today I went around to all of the Connect Four arenas and updated them.

I got rid of the fence blocks that occasionally blocked the players view of the board, and replaced them with invisible (barrier) blocks so it's much easier to see and play the game!

There have been other minor updates to various arenas too. Whether it was a minor change in a few blocks inside the arena, or a fix on the board it's now fixed and updated.

-Lme