app.js mouseenter/mouseleave processing needs blocked during transition animations about bihisankey

[Neilos]

Cheers for this Brett

The fix was a little more complicated than it first seemed, because some of the animations involved two consecutive transitions and the same problem (interrupting animations) was also a potential problem on the initial page load.

I went with something pretty close to what you suggested, and have updated the gist accordingly.
https://gist.github.com/Neilos/584b9a5d44d5fe00f779/6e7d9c0bfcd1f9fba85339b231d17cbac6212b06

If you want to see the example in action you might have to wait for the bl.ocks.org cache to clear first. Alternatively, just use the link below:
http://bl.ocks.org/Neilos/584b9a5d44d5fe00f779/aa7409c5d86bd49b23353b11d9a43c9f2c77dfe1