codec2 library update
Bring codec2 up to the latest version, and add support for all six bit rates.
vocoder: add default mode parameter and updated documentation
Merge branch 'merge-codec2-update'
Corrected codec2 encoder documentation.
documentation - fix example in case anyone gets confused
Merge branch 'maint'
controlport: in gr-perf-monitorx, if all work times returned are 0, avoid a divide-by-zero fault.
Merge branch 'maint'