grafx - Extensible Java Graphics Package Code

In FloatPolyEdge, making numNodes() package visible. It used to be private and
not used anywhere. So why even have it?

Adding NaN handling in line drawing, 2D rendering.

Adding to NaNTest. I have work to do.

Adding more to NaNTest.

Adding NaNTest. Will add more.

Fudging the user drop block initiation delay. Even for pos.getZ() == 0.

I think these will be the final settings for
RATIO_APPROX_ROT_ANIM_TO_USER_DROP_ANIM and associated 'fraction'.

Forgot to use 'fraction'.

This is the first attempt at user drop block initiation delay, it compiles but
nothing has been run yet. I want to save this work even if it does not
function correctly because I don't want to lose these changes, which have been
meticulously crafted. Unfortunately the negative side effect of working this
way is that I sometimes commit broken code to the repository; I think for that
reason Git was invented, to make branching a lot more easy. I like Subversion
for small projects for its intuitive nature.

Extracting a System.currentTimeMillis() call in run_computeUserEvents(int)
because that value will be used again.