Release 20210424

Noted that gprbuild is a prerequisite.

Improved the makefile:

• it doesn't warn before building a missing makeconf
• it doesn't introduce a bad project subdirectory when installing
• it includes an uninstall target
• it no longer supports uploading documentation to SourceForge.

Tcl_PrintObj deals with a null parameter instead of dereferencing it.

Release 20200802

This release supports use of ActiveTcl on macOS. Prompted by the Catalina/Xcode 1.6 warning that the native Tcl/Tk won’t be supported in future releases.

Also removed some compiler warnings.

Corrections to setup process

The setup process (setup.tcl) didn’t work properly on Darwin (Mojave, & probably later) or Windows 10.

Fixes issue #1 .