board + engine
Merge branch 'master' of https://github.com/djouanno/sweetsnake

Conflicts:
	sweetsnake-server/src/main/java/com/esir/sr/sweetsnake/session/SweetSnakeGameSession.java
	sweetsnake-server/src/main/resources/spring/sweetsnake-server-context.xml
	sweetsnake-server/src/test/resources/spring/sweetsnake-server-context-test.xml
Engine + Board + modif suite au renommage des classes