Finished melee attack functionality for the player.

Now properly makes attack boxes and checks for mob collisions when attacking.

Properly displays the attack animation/image correctly when attacking.
Small commit: Started adding zoom to the camera. Added/Edited method comments for mob/player melee attacks.

The zoom works to scale up the sprites/stuff, but following and keeping the player in the center fails.

Also cannot zoom the level at all, not sure if there is a way with the Xtiled lib...