Update AbstractSoundInstance.js
Update AbstractSoundInstance.js

Docs fixes
kidaa/SoundJS,tehvgg/SoundJS,not-only-code/SoundJS,legendvijay/SoundJS,SpringRoll/SoundJS,konistehrad/SoundJS,ebabel-eu/SoundJS,musikame/SoundJS,musikame/SoundJS,CreateJS/SoundJS,SpringRoll/SoundJS,tehvgg/SoundJS,Teino1978-Corp/Teino1978-Corp-SoundJS,konistehrad/SoundJS,CreateJS/SoundJS,not-only-code/SoundJS,legendvijay/SoundJS,andrew168/SoundJS,ebabel-eu/SoundJS,baiyanghese/SoundJS,Teino1978-Corp/Teino1978-Corp-SoundJS,andrew168/SoundJS,kidaa/SoundJS