==========================================================================
Corrections in version ssj-1.1.9

- package util
  Added the Num.log1p(x) for better accuracy of log(1 + x) at small x.

- package randvar
  Added the classes BetaSymmetricalPolarGen and BetaSymmetricalBestGen
    that generate symmetrical Beta variates.

- package rng
  Provided a faster method to jump the the next substreams in all the WELL*
  generators and in the F2NL607 generator.

- package probdist
  * Replaced all functions Math.log(1+x) by Num.log1p(x) for better accuracy.

  * Corrected LogarithmicDist:
       the probabilities were not always computed correctly.

  * Corrected a bug in BinomialDist:
       the method inverseF(u) had a bug for n = 1.

  * Added the bivariate normal distribution:
       classes BiNormalDist, BiNormalDonnellyDist and BiNormalGenzDist

  * Added the bivariate t distribution:
       class BivariateTDist.

  * Added the Brent-Dekker method to compute the inverse distribution function
    for an arbitrary continuous probability function.

- package hups
  * Changed the constructors in class NiedXingSequenceBase2. The old 3
    arguments constructor has been eliminated and the 4 arguments constructor
    of the previous version has become the 3 arguments constructor
    of the new version. This gives the correct generating matrices for the
    Niederreiter-Xing sequence; the old 3 arguments constructor used
    the transposed generating matrices.

  * Correction in NiedXingSequenceBase2 and in NiedSequenceBase2 and in
    DigitalNetBase2FromFile: 
    did not work correctly for number of bits = w < 31.



==========================================================================
Corrections in version ssj-1.1.8

- package rng
   LFSR113, LFSR258:
    programmed a faster method nextInt

- package gof
   FBar, FDist:
    added a better approximation for the Anderson-Darling distribution.

- package probdist
   BetaSymmetricalDist:
    added a much faster inverse distribution for parameter alpha > 1.

   BetaDist:
    corrected a bug that gave the wrong values for the CDF for some 
    range of parameters.

   BinomialDist, PoissonDist, ExponentialDist, JohnsonSUDist, ParetoDist,
      WeibullDist:
      added a better approximation in the tails of the distributions.

   GammaDist: added a better approximation for large alpha.

   Corrected a bug in DiscreteDistribution: the inverseF function was
   not correct for cdf(x) > 0.5.

   Made a correction in EmpiricalDist: the barF function.

- package randvar
   BetaStratifiedRejectionGen  object always returned 0.
    Bug correction

   GammaRejectionLoglogisticGen object went into infinite loop.
    Bug correction

- package util
   class ChronoSingleThread has been added.
