Improved some location and area names. #7

Great Marsh is now Great Marsh instead of Safari Zone.

Ruin Maniac Tunnel has been consolidated into one location, and the
areas are actually named informatively.

Turnback Cave has more appropriate area names.

Routes with two parts now mention the cardinal direction in the area
names.  Also, several town names have been fixed.

Lake Verity's area names now mention WHAT they are before/after.