Better AI, Polish, Bug Fixes

The AI for the skeleton enemy was improved. I made it so that the skeleton periodically tries to strafe around the player instead of just running into them as they attack. This makes the enemy feel a little more real. They do miss a lot because of it right now though so I will need to improve it. I fixed bugs with their footsteps not playing correctly as well. I reduced the range on them as well so hopefully there is less of them standing at the edge of it and missing.