Public issue https://github.com/mackron/miniaudio/issues/410

This allows the node graph to be connected to another node graph.

Public issue https://github.com/mackron/miniaudio/issues/410

Public issue https://github.com/mackron/miniaudio/issues/410

This bug results in an audio glitch when mixing nodes in the node
graph. It specifically happens when resampling is not being performed,
in which case it was specifying an output frame count greater than the
number of frames that are actually being output.

Public issue https://github.com/mackron/miniaudio/issues/408

Public issue https://github.com/mackron/miniaudio/issues/409

This commit removes the custom data loop and instead implements the
onDeviceRead and onDeviceWrite backend callbacks. This simplifies the
implementation and fixes a bug with duplex mode where the capture and
playback devices have different native sample rates.

This commit also fixes a bug with fixed sized callbacks with duplex
mode.

Public issue https://github.com/mackron/miniaudio/issues/397

Public issue https://github.com/mackron/miniaudio/issues/400

Public issue https://github.com/mackron/miniaudio/issues/400

Public issue https://github.com/mackron/miniaudio/issues/399

Public issue https://github.com/mackron/miniaudio/issues/318

Public issue https://github.com/mackron/miniaudio/issues/318

Add support for GDK (<https://github.com/microsoft/GDK>)

Public issue https://github.com/mackron/miniaudio/issues/396

This is WIP. There's still some atomicity errors in here.

Public issue https://github.com/mackron/miniaudio/issues/318

A device job thread is used for processing jobs from a separate thread
for cases where doing a certain operation needs to be done from outside
a callback.