expanded match_events to support one-sided matching
expanded match_events to support one-sided matching

stefan-balke/librosa,ruohoruotsi/librosa,stefan-balke/librosa,r9y9/librosa,carlthome/librosa,stefan-balke/librosa,ruohoruotsi/librosa,r9y9/librosa,carlthome/librosa,r9y9/librosa,carlthome/librosa,ruohoruotsi/librosa