• documentation updates/corrections/examples by Marius Hofert
• df = Inf
• rmvt(): argument 'mean' not allowed anymore (prone to misuse)
• pmvnorm(lower=c(-Inf, 0, 0), upper=c(0, Inf, Inf), mean=c(0, 0, 0), sigma=S, algorithm = Miwa()) returned NaN, fixed by Xuefei Mi