Added several classes and renamed the main class

Main class renaimed from a3p to Philophobia
New class : CliOptions
	Used to analyze the options passed to the program via command
	line
New class : Window
	Used to handle the window
New class : UI
	Used to handle the graphics for all the window
New class : World
	Used to handle the world's graphics, which include the hero, the
	background and objects like houses and trees
New class : Scenery
	Objects like houses and trees contained in the World class