Windows installer (with ECL): Update w64devkit.
Windows installer: Build wxMaxima without libfribidi requirement.
Windows installer: Update Gnuplot.
Windows installer: Update mswebview.
Windows: Update w64devkit (used for ECL).
Windows: Build wxMaxima with -DWXM_USE_FRIBIDI=OFF.
Windows installer: The monthly SBCL update.
Add new files in crosscompile-windows to Makefile.am.