First release.
maxconstant_c(), a C implementation of CAs::maxconstant(). Arrays
with NA cells are accepted and treated as in the current
CAs::maxconstant() (version 0.24-4): an NA cell matches no symbol
when rows are compared, and the NA cells of the rows made constant
are filled.powerCT_any(), power_plan() and power_build(), the power
construction of Colbourn and Torres-Jimenez for any strength, number
of columns and number of levels, homogeneous case.count_core(), tuple counts for every set of t columns.flexpos_c(), markflex_c() and postopNCK_c(), C versions of
CAs::flexpos(), CAs::markflex() and of the marking steps of
CAs::postopNCK().