0.2    first version to CRAN
 0.2-1  fixed bugs in docs found by scripts on CRAN (R-devel check)
 0.3    added data/echinacea.txt
              man/echinacea.Rd
              test/tutor.R
        added test in aster.R
        added package vignette
        added examples on all help pages to be used by users
 0.3-1  changed variable "site" to "pop" in echinacea.txt
        corresponding changes in many other files
        \usepackage[utf8]{inputenc} in tutor.Rnw
        many small changes in wording in tutor.Rnw
 0.4    made trust the default optimizer
 0.4-1  removed the timing.pdf vignette, fixed xrefs to trust in Rd files