Version 0.1.6

   o fixed some bugs

Version 0.1.4

   o fixed some bugs

   o created a full tour of nda

   o build vignette by pkgdown

Version 0.1.3

   o fixed some bugs

   o generate random block matrices


Version 0.1.2

   o fixed some bugs

   o plot, biplot functions are specified

   o summary, print functions are specified


Version 0.1.1

   o fixed some bugs

   o added a new dataset about crimes in the USA 1994


Version 0.1.0

   o package release on GitHub.
