Shield bash

[MicroChasm]

Currently, the shield bash does not attack the tile adjacent to the player, but rather the tile one spot away. I think we may have done this to make sure that weapon attacks require position changes. However, in practice it doesn't feel right-- rather, I think that the shield bash should attack the tile adjacent to and the tile one spot away from the player, and it should push the golem one spot further than that. The player themselves should move one spot during the attack.