world map and other fixes / changes

- Added a world map, which can be opened by pressing 'M'

- Your current location is marked on the world map and changes as you move through different areas.

- Implemented damage calculation for monsters. Previously monsters would inflict a static amount of damage. Higher level monsters will deal increased damage to the player, lower level monsters will deal less.

- Attacking while grounded will slow the player instead of stopping them outright. (you can still jump while attacking to negate this)

- Fixed daggers hitting multiple enemies.

- Fixed instances where hit animation would sometimes not play.