code: function move(x, y) {
           this.moveTo(this.pos.x + x, this.pos.y + y);
         }
docs: move the camera upper-left position by the specified offset.
  @name move
  @memberOf me.Camera2d
  @see me.Camera2d.focusOn
  @function
  @param {Number} x
  @param {Number} y
  @example
  // Move the camera up by four pixels
  me.game.viewport.move(0, -4);