For the full log of gretl changes since January 2000, see
<@url="http://gretl.sourceforge.net/ChangeLog.html">.

2020-08-06 version 2020d
- Fix GUI bug: crash on copying data series to clipboard
  in formats other than plain text
- "poisson" command: switch to using Newton-Raphson with
  analytical hessian; also use analytical hessian for
  "negbin", and add Wald chi-square tests for both
- "cusum" command: add a --plot option
- GUI console: protect from deletion when a command is
  being executed
