Initial checkin of computer modifications.  Added "examine" tag for consoles in terrain.json.  Moved computer usage to iexamine.cpp.  Added new computer action/failure/option classes.

	modified:   computer.cpp
	modified:   computer.h
	modified:   data/json/terrain.json
	modified:   game.cpp
	modified:   game.h
	modified:   iexamine.cpp
	modified:   iexamine.h
	modified:   mapgen.cpp