Test different ways of defining a motion path.

Four animations have been defined that move a triangle along a path. For each animation, reference rectangles, lines and text are provided to help show what the correct behavior is. The red text shows the way that the motion path is specified.

The first animation uses the 'from' and 'to' attributes to define the motion path. The second animation uses the 'values' attribute to define the motion path. The third animation uses the 'path' attribute to define the motion path. The fourth animation uses the 'mpath' sub-element to define the motion path.