Added SynthControlGroup.make_synth_new_settings().
Added SynthControlGroup.make_synth_new_settings().

The method assists with allocating synths.

andrewyoung1991/supriya,andrewyoung1991/supriya,Pulgama/supriya,Pulgama/supriya,Pulgama/supriya,Pulgama/supriya,andrewyoung1991/supriya,josiah-wolf-oberholtzer/supriya