Add the 'isUniUpper' function for dense matrices
Add the 'isUniUpper' function for dense matrices

ColinGilbert/blaze-lib,lsalamon/blaze-lib,gnzlbg/blaze-lib,amaniak/blaze-lib,amaniak/blaze-lib,byzhang/blaze,wsavoie/blaze-lib,ironm73/blaze-lib,nyotis/blaze-lib,ColinGilbert/blaze-lib,wsavoie/blaze-lib,lsalamon/blaze-lib,lsalamon/blaze-lib,gnzlbg/blaze-lib,wdv4758h/blaze-lib,wdv4758h/blaze-lib,wdv4758h/blaze-lib,ironm73/blaze-lib,ColinGilbert/blaze-lib,honnibal/blaze-lib,gnzlbg/blaze-lib,wsavoie/blaze-lib,honnibal/blaze-lib,ironm73/blaze-lib,nyotis/blaze-lib,byzhang/blaze,honnibal/blaze-lib,amaniak/blaze-lib,byzhang/blaze,nyotis/blaze-lib