Version 2.0.0: 2026-11-01    o Version 2.0.0 released.
                             o New bandwidth selector h.scv(): Smoothed
                               Cross-Validation (Hall, Marron & Park 1992) with
                               fully analytical closed-form criterion for the
                               Gaussian kernel.
                             o New logistic kernel K(x) = e^{-x}/(1+e^{-x})^2,
                               derivatives up to order 20 and exact constants
                               R(K^(r)), in all selectors, dkde(), kernel.fun()
                               and kernel.conv().
                             o New power kernel family Pow(s,t):
                               K(x) = c(1-|x|^s)^t on [-1,1], given as
                               kernel = "pow(s,t)" or kernel.pow(s, t), for any
                               s > 0, t >= 0, in all selectors, dkde(),
                               kernel.fun() and kernel.conv(). It reproduces
                               uniform, triangular, Epanechnikov, biweight,
                               triweight and tricube exactly.
                             o nthreads: 0 now always means all cores (capped
                               by OMP_THREAD_LIMIT) and a call no longer
                               changes the threads of later calls; h.ucv()
                               with 0 used a single thread. dkde() and h.mlcv()
                               now use nthreads. New Cpp_omp_threads().
                             o Added second author: Amel Henider.
Version 1.0.4: 2026-01-27    o Version 1.0.4 released.
                             o Other minor bug fixes: R (>= 4.3.2).
Version 1.0.3: 2015-10-30    o Version 1.0.3 released.
                             o Other minor bug fixes: R (>= 3.2.2).
Version 1.0.2: 2015-01-28    o Version 1.0.2 released.
                             o Other minor bug fixes: R (>= 3.1.2).
Version 1.0.1: 2014-08-18    o Version 1.0.1 released.
                             o Other minor bug fixes: R (>= 2.15.1).