Added sword image from storyboard to replace the placeholder sword.
Implemented more sensible knockback in the enemy. Now I need to transfer it over to the player.
Implemented player knockback. Now I will make the knockback force come from the enemy that hits the player as opposed to from the player itself.
Knockback force now comes from a parameter in TakeDamage.
Merge branch 'feature/better-knockback' into develop