* Create midi-channel-ab.c

midi-channel-filter.c + bits of midi-split.c = an attempt at a per channel output A/B routing

* Update Makefile for ab plugin

* Update midi-channel-ab.c

fixed incorrect copy/paste

* add A/B plugin

* Add A/B plugin

* Add A/B plugin

* Add A/B plugin

* Add A/B plugin

* Rename and reorder binary options

* Fix output order

* Fix order(?)

* Fix order

* More efficient code, floats to booleans, comparison fixes

* Revert mistake

* Fix midi output port numbers

* Fix maker name

* Add copyright header line

Closes #262