Alpha-09 proj 20something of 56: Delay Done; now Envelope

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The Alpha-09 release is the "clean-up" release: nothing new and huge, but lots of little changes here and there to either add features or fix bugs or bad designs.

I've finished all the tweaks of the Delay, which is now about 30% re-written. It can be over 4x faster now, if you're using it for something simple (lots of taps with fixed times, such as a reverb). It has a new panning mode.

Now I'm working on the Envelope. Everything is too boring to go into, except to say that it will all work just a little better or have slightly better output.