ajout des sprite sfml
ajout des texture
Merge branch 'master' of https://github.com/jspdown/Nibler-patel-ozouf

Conflicts:
	ressource/sfml/snakepart-bottom
	ressource/sfml/snakepart-left
	ressource/sfml/snakepart-left-top
	ressource/sfml/snakepart-queue-bottom
	ressource/sfml/snakepart-queue-left
	ressource/sfml/snakepart-queue-right
	ressource/sfml/snakepart-queue-top
	ressource/sfml/snakepart-right
	ressource/sfml/snakepart-right-top
	ressource/sfml/snakepart-top
	ressource/sfml/snakepart-top-left
	ressource/sfml/snakepart-top-right
Merge branch 'master' of https://github.com/jspdown/Nibler-patel-ozouf
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