merge classSVD() and kernelEVD() into comprehensive classPC();
move the R code of classPC() + rankMM .. into separate R file;

document classPC() and rankMM(), incl. examples; 
NB: The tmcd.Rout.save needed updating after VT`s  Fortran change (!)

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/robustbase@629 694ef91d-65df-0310-b7bb-92e67a308ead