added ifndef's to map. and world.h, made mapLoad() more useful API, minor changes to user_interface.c
beginning massive map object overhaul, minor changes to user_interface and world.c
added extern keywords to function declarations and new prototypes to world
implemented getters, cleaned up code, misc. fixes.
added maptest binary, slight changes to map
added usage to maptest binary
updated Makefile and main.c
fixed usage in maptes