Feature/ck reflex

Re-submit **CK Reflex** effect (initial PR https://github.com/stretta/BEAP/pull/22).
It was deleted without comment at ab58f0cf9197a9e99eb5f1c2ada601848b82f5a0... There's no mention of rationale in the commit, so in case it was accidental, here it is again.
I've tweaked up the interface to neaten it and better match the rest of BEAP.
The one major issue I still have is that the initial config (reasonable defaults for a good OOB user experience), while showing on the knobs, is actually not active. I guess all parameters are set to 0? Touching all of the knobs will cause it to start processing as expected (after the last knob is tweaked).