MF: valgrind check -> updated Game.h & Game.cpp to fix errors
MF: Command.h ( 1, 2, 3, 4 )
MF: Command.cpp ( 1, 2, 3, 4 )
MF: Game.h ( 1, 2, 3, 4 )
MF: Game.cpp ( 1, 2, 3, 4 )

MF: Game::clear() implemented;
MF: All Commands (echo, show, next, list, quit) implemented.

ToDo:
- Exceptions:
	+ Bad Alloc_Exception
		Game::addTower(...)
		Game::addMonster(...)
	+ Out Of Range:
		Game::splitInput(...)
		...
	+ ...

- 1 Coding Standard
  2 Function Description Headers
  3 Commenting
  4 check #includes:
	+ CommandEcho.h
	+ CommandEcho.cpp

	+ CommandList.h
	+ CommandList.cpp

	+ CommandNext.h
	+ CommandNext.cpp

	+ CommandQuit.h
	+ CommandQuit.cpp

	+ CommandShow.h
	+ CommandShow.cpp

	+ Tower.h
	+ Tower.cpp

	+ Monster.h
	+ Monster.cpp