0.68 Sat, 11 Mar 2006 17:07:29 -0500
  - (!!) fixed insanity with fox calculus argument ordering

    These changes are likely to have broken older code. Review all
    applications of fox derivative.

    Originally, fox calculus functions tried to follow mathematical style
    where functions are applied right to left. That was just too annoying
    and counter-intuitive in a computing environment. All lists of
    operations now start at the beginning of the list and proceed from
    there.

     * H_(i,j) = __FoxHessian(e) = __FoxJacobian( de/dx_i )
     * _fox_derivative(e, [a,b,c]) = d/dc( d/db( d/da(e) ) )
     * __FoxDerivative(e, [i], [f, g, h]) = h( g( f( de/di ) ) )

  - RENAME LCM_INT -> _arr_LCM_INT
  - RENAME PolynomialGCD -> MonomialDenominatorLCM
  - Expand several functions to behave properly on constants:
    ConstantTerm, NrIndeterminates, IndeterminateNumbers, Indeterminates
  - MonomialLCM and MonomialGCD use Reduce(L,MonomialLCM2) and Reduce(L,MonomialGCD2)
    so that we can operate on constants as well