0.1.0

• Introduce Signal.Gate.t and Signal.Trigger.t wrappers of bool Signal.t
• Rename clock constructor to clock_of_frequency_hz
• Use floatarray instead of float array
• Add saturation operator
• Add map2 and map3 combinators
• Add missing downsample argument to visualized signal players
• Stop exporting labelled stdlib modules
• Add tests in new package
• Rename filter arguments to be more consistent and intuitive
• Rename Square waveform to Pulse
• Live midi support in core library
• Add package for parsing and representing midi data
• Rename ASR envelope generator to "AR"
• Rename Output_stream.create_with_downsample to Output_stream.create