Added the AudioToolbox framework
Added the AudioToolbox framework

Added the AudioToolbox framework in Installing and Usage section

SuPair/BFKit,PodsMakleso6/BFKit,zilaiyedaren/BFKit,FabrizioBrancati/BFKit,GitHubChenFeng/BFKit,NghiaTranUIT/BFKit,mjasa/BFKit