Add demo example
Add demo example

azawawi/perl6-gtk-scintilla,azawawi/perl6-gtk-scintilla,azawawi/perl6-gtk-scintilla,azawawi/perl6-gtk-scintilla,azawawi/perl6-gtk-scintilla,azawawi/perl6-gtk-scintilla,azawawi/perl6-gtk-scintilla,azawawi/perl6-gtk-scintilla,azawawi/perl6-gtk-scintilla