Fixed bug in "fire arrow" choice.

Had the wrong user input as an option for fire arrow. The user may now shoot an
arrow by selecting "f" at the options. When I return to this program I plan to
add the following:
	1)	Bats that will carry a user to another cave.
	2)	Pits that the user will fall into (identified by a breeze)
I will fix the following:
	1)	Caves will only have one tunnel to each location (no 1 cave going to the
			same secondary cave 2+ times)
	2)	Caves will be able to link to fewer than 3 other caves.