Make Satie.config not settable
This MR removes the setter on Satie.config
as changing this attribute after Satie has booted could lead to unforseen failures. This doesn't appear to have any negative consequences on current behaviour. It's still possible to configure Satie like so:
a = Satie(SatieConfiguration(s));
a.config.server.options.numOutputBusChannels = 5;
a.boot;
a.quit