voices - round robin and shit (and [voices~])

[porres]

• add 'retrig' to [voices~]
• noteoff message for a specific voice?
• rename 'rel' to 'release'?

[porres]

uma voz livre mas ainda em release deve ter prioridade com uma voz presa na hora de ser roubada

[porres]

implement true non round robin mode

[porres]

check vanilla's resize method

[porres]

• add 'split' mode/features to [voices] or something / discussion in https://github.com/porres/pd-else/issues/1388

• hold/free method for [susloop]

• resizing issues - just clear, like in https://github.com/pure-data/pure-data/pull/661? (or flush only the extra voices?)

• release value for each voice?

• '-list' for MC? 1st output is list of frequencies, 2nd output is list of velocities. [voices~] is just a wrapper around this and something that already sends multuchannel signals by including [f2s~]. This wil work the same way as VCV deals with polyphony.