Changes in version 1.2.1 (2021-11-09)                  

  - Authors and links of reference papers added.
  - Explanation of values added for these functions:
    as.matrix.multiPhylo, as.vector.phylo, plot.troppca,
    read.nexus.to.data.matrix, read.tree.to.data.matrix, troppca.obj.
  - Replace \dontrun{} to \donttest{} for examples of troppca.polytope,
    troppca.linsp, troppca.linsp2polytope.
  - on.exit() added to restore users' plotting option in plot.troppca.
  - Update in documentation of these functions:
    read.nexus.to.data.matrix, read.tree.to.data.matrix.

                        Changes in version 1.1.1                        

  - Initial submission