[All] Removed Input namespace, all objects will have only one namespace : Atlantis.
[Sprite] 1st parameter is the texture and the second are parameters.
[SpriteFont] Moved in Texture2D file
[Helper] New Ajax method (more simpler) and Notify method (idem)
[Input] Better implementation of pointer manager.
[Samples] New screen selector, fixed all other projects relative to latest changes.