some plot tweaks related to gretl.Dataset::get_series() method refactoring
pvalue(), critical(), pdf(), cdf(), invcdf() now accept sequence as well (i.e. list, tuple)
come NumPy -> gretl.Matrix work
new static GretlMatrix::zeros() method
update a log
speed scripts adjustments
GretlPackage: GRETL_TYPE_SERIES as gretl.Matrix
GretlMatrix:: two new constructors from double* and double**