Presence Footsteps

Changelog:

• Fixed secondary volume sliders not triggering a save when changed. #210
• Added a Toki Pona translation via @ParanormalChicken
• Bamboo no longer produces sounds when you walk beside them (unless they have leaves)
• Bamboo sprouts no longer produce sounds of any kind #211
• Running Volume Increase is now "Speed Attenuation" and supports negative values #206
• Added a setting to adjust wet surface noises (mud) when walking on blocks in the rain. The default is 50% #209