Frequency shifter module

Has positive and negative shifts (based off of freqshift~).  Thru-zero
mode removes negative components from negative frequency shift.
Oversampled x2 to avoid aliasing.
Dict fix

Using multi slider now instead of dict and doing calculation  at signal
rate.  Increased the wavetable size.
bp.Oneshot

Allows one trigger/gate to pass through; other triggers/gates are
blocked until the module is rearmed, either automatically or manually.
This is the signal-rate equivalent of one bang.
Added sample and glide (like rand~)

Added sample and glide (like rand~).  It’s now on inlet 7 on the
selector~.  (I moved over the binary random noise because it wasn’t
selectable in the menu, so that continues, and now option 7 is “smooth
rand.”)