This directory will contain many standalone .rb files that demonstrate
ruby-gtk2 and ruby-gtk3. The idea is that ruby-users can simply run
these on the commandline, as-is, in order to show what GTK+ is able
to do.

Since as of November 2020, the examples are split between gtk2 and
gtk3.

The directory advanced/ may contain more advanced examples which 
also showcases what the gtk_paradise gem offers. These will thus
not be "standalone" per se.
