[fx] start: function should be passed animation's node value

[dante]

as per the discussion in the forums:

We should pass the animation instance's node to the start: function if it is in fact a function.

there is a note at the bottom of the thread from me suggesting we support auto calculations, too.

dojo.anim(n,{ width: "+=100" });

but the same should go in style() too (though this should probably be a separate ticket)

[bill]

move decaying tickets into "future" milestone

[dante]

fixed in [17247]