v0.5.0

• Replaced the libsoundio audio abstraction layer with miniaudio, heralding first-class Windows and Linux support.
• Retired historical AudioOut classes for different operating systems, and refactored querying of inputs/outputs/backends
• AudioGraphConfig: Added auto_record flag, to automatically record all output in timestamped audio files
• Added support for instantiating AudioGraph and AudioGraphConfig with the path of a config file
• Modified AudioGraph to become a singleton, and throw a warning instead of an exception upon attempting to create a second AudioGraph
• Added Python bindings and added unit tests for SampleRingBuffer and SampleRingQueue classes
• Nodes:
  • Added Bus node, to act as a fixed-channel summer with variable inputs
  • Added Maraca node, a simple physically-inspired model of a shaker, after Cook (1997)
  • Added ChannelOffset node to offset a node's output by N channels, and node.play(output_channel=N) syntax
  • Added SelectInput node, to pass the output of an input whose index can be modulated at audio rate
  • Added HistoryBufferWriter node to capture a rolling signal history window, useful for oscilloscope UI display
  • Added Accumulator node, to accumulate energy with some leaky decay coefficient, and accompanying calculate_decay_coefficient function
  • Added abstract VariableInputNode class
  • Added stutter_probability and stutter_advance_time inputs to Stutter