hhh4:
- allow lags != 1
- removed nTime and nUnits from control object created in setControl()
- added test of hhh4() against algo.hhh() for influMen example


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/surveillance@797 edb9625f-4e0d-4859-8d74-9fd3b1da38cb