Bow and arrow

With the latest update the player can now load an arrow on a bow, and shoot the bow. The chance of the arrow hitting its target decreases 5% per tile travelled. If it is a hit, the target will lose an amount of hp that is equal to the bow str plus the arrow dmg.

I am also experimenting a bit with the graphics, adding a black outline to all items. This makes them easier to see on a character, although perhaps it takes away a little bit from the simple retro look.

One of the next things on my todo list is the ability for certain monsters to use some of the actions they cannot yet use, such as picking up and equipping items, throwing them, and shooting the bow and arrow.