Added 3.6 to the travis build matrix. Implements #483
Added 3.6 to the travis build matrix. Implements #483

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