v1.0.4

• Added playable Music asset type.
• Added Spatial Audio Settings asset type for 3D spatialisation.
• Added options for 3D spatialisation.
• Added options to ignore the audio listener.
• Added Playback 'Finished' and 'Paused' event.
• Added SoundEffect and Music 'Played' event.
• Added helper method to convert db to 0-1 range logarithmically.
• Added editor context/menu actions for controlling playback during runtime.
• Renamed Audio class to AudioHelper.