Extended the parser and triangle and quad classes
- extended the parser for quads and triangles in order to read the 'order' attribute that indicates
  which is the corect order of points in quads and triangles, so you can use order="cw" to indicate
  that points have to be read in clockwise order or use order="ccw" to say that points have to
  be read in counterclockwise order.
- defined the private pointsOrder attribute for quads and triangles that contains the current order
  of the points in that quad or triangle.
- defined new exceptions
- enabled the cullface and lighting flag of the render