Try to sort signal operators more sensibly
Add HotSignal.skipRepeats()
Add HotSignal.takeUntil()
Add HotSignal.takeUntilReplacement()
Add HotSignal.sampleOn()
Reimplement HotSignal.take() with takeWhile()
Add HotSignal.deliverOn()
Add HotSignal.delay()
Restore old HotSignal.throttle() implementation