2007-02-25 David Luethi
 	ghyp V0.8.3
 	
2007-03-26 David Luethi
 	ghyp V0.9.0
 	* Bug fixed in lin.transf
 	* Slots aic and fitted.params added to mle.ghypuv and mle.ghypmv
 	* Function stepAIC.ghyp added
 	* Argument names "log" and "legend" changed to "log.hist" and "plot.legend" respectively in qqghyp and hist
 	* Some corrections in the vignette
 	
2007-06-08 David Luethi
 	ghyp V0.9.2
 	* Internal function abar2chipsi: epsilon changed to .Machine$double.eps
 	* Internal function internal.dghyp, internal.dghypmv: Warning message changed
 	* Internal function mle.default, fit.ghypmv: Output properly formatted with sprintf.
 	* Spline interpolation in internal function internal.dghyp for transition to singularity for the Variance Gamma case
  * Generic functions logLik and AIC added.
  * Some changes in the package vignette.
  
2007-07-05 David Luethi
 	ghyp V0.9.3
  * Some changes in the package vignette and documentation.  
  * Function ghyp.moment added.
  
2007-09-14 David Luethi
 	ghyp V1.0.0
  * fit.ghypmv: default relative tolerance set to 1e-8
  * fit.ghypmv and fit.ghypuv: Parameter transformation changed to "log" 
  * t.transform changed
  * inf.t.transform: added; inverse of t.transform
  * Some changes in the package vignette and documentation.    
  * Bug fixed in check.opt.pars: Check for 'symmetric' and opt.pars['lambda']
    and set opt.pars['lambda'] to FALSE when 'symmetric' is TRUE
  * hist.ghypuv: Warnings now more meaningful
  * check.norm.pars: Warnings now more meaningful
  * Function 'lin.transf' replaced by the generic 'transform'
  * Function 'redim' replaced by the generic '[.ghyp'
  * Function 'ghyp.param' replaced by the generic 'coef'
  * Methods 'show' changed and 'summary' added for objects of class 'mle.ghyp'
  * Argument 'standardize' introduced in the fitting routines 'fit.ghyp..'
  * Methods 'plot' and 'lines' added.
  * Initial parameter value 'nu' changed in 'student.t', 'fit.tuv', 'fit.tmv'.

2008-02-05 David Luethi
   ghyp V1.1.0
  * fit.ghypuv, fit.ghypmv now equipped with a rather reasonable error handling
  * Function 'ghyp.name' added
  * Internal function besselM3: For nu == 0.5 in besselK there is a faster expression for the bessel function which is now implemented.
  * Some minor changes in the vignette


2008-03-07 David Luethi
   ghyp V1.2.0
  * Special case of a Gaussian distribution implemented (constructor 'gauss' added).
  * Deprecated functions 'lin.transf', 'ghyp.params' and 'redim' removed and replaced with 'transform', 'coef' and '[', respectively. 
  * ghyp constructors added for 'alpha.beta' parameters.
  * Vignette updated and newly implemented parametrization documented.
  * Error handling improved for qghyp, pghyp, (ESghyp), qgig, pgig, (ESgig).
  * Constructor 'ghyp' modified such that the variance of the mixing-variable is not required for the symmetric case.
  * Student-t density now allows "chi.psi" and "alpha.delta" parametrization.
  * dghyp and pghyp now handle NA's, NaN's and Inf's properly.
  * Some improvements in the manual.
  * Internal functions 'is.gaussian', 'is.symmetric.t' and 'is.univariate' added.
  * Internal functions 'get.stepAIC.ghyp' added.
  * Univariate symmetric Student-t distribution now use R built-in functions.
  
2008-07-07 David Luethi
   ghyp V1.3.0
  * Option lower.tail added in pghyp 
  * fit.ghypuv: Initial values of mu and sigma are now median and mad, respectively (instead of mean and sd).
  * ghyp-constructors: Default parameter values changed for skewness parameters gamma and beta to rep(0, length(mu)).
                       For dispersion matrices sigma and Delta to diag(rep(1, length(mu))).
  * The function 'qqghyp' now has an argument 'add' which determines whether the points should be added to an existing 
    plot window.
  * Constructor function "ghyp": all(gamma) == 0 changed to all(gamma == 0).  
  * Internal function 'is.symmetric.t' changed to 'is.student.t(object, symmetric = NULL)'.
  * 'coef' applied to a Student-t distribution now also returns the degree-of-freedom 'nu',
    which is nu = -2 * lambda. Function 'show.ghyp' adapted accordingly.
  * It is now possible to switch from the 'chi.psi' parametrization to the 'alpha.bar' parametrization.
  * Package vignette enhanced
  * Slot 'trace.pars' added to class 'mle.ghyp'. This slot contains a list (optionally in case of a multivariate fit) which
    stores the parameter values during the fitting procedure.
  * 'fit.ghypmv' is equipped with a boolean 'trace' as a consequence of the above modification. In the univariate case 
    'trace' is always true, meaning that the parameters will be stored in the slot 'trace.pars' in any case.
  * 'ghyp.fit.info' returns a formatted version of the data in the slot 'trace.pars'.
  * Initial value of 'alpha.bar' changed to 0.5 instead of 0.1 in 'fit.ghypuv'.
  * Function 'ghyp.omega' added. 'ESghyp' and 'ghyp.omega' are now described in the .Rd file 'ghyp-risk-performance'.