fix RemoteBuggle : add int2str and getWidth/HeightWorld
add command on LanderEntity
fix somme bug and solutions on C files
add C on exoTest
modify error message on Entity and remove run call when it's C
add compilation when demo is call with C
add C on Exercise, but it compile java correction to inject in world. This is to be able to prohibit certain methods
add compilation before executing demo otherwise the code of the user was start for the demo
add getHeight/widthWorld and modify forward/backward in command