Add example meta help file

mkit.ini

     libexec = src/libexec/saturnin-demo-dump
     libexec = src/libexec/saturnin-demo-echo
     share   = src/ini.d/main/echo.ini        ini.d/main/echo.ini
+    share   = src/help
 
 #mkit version=0.0.24

packaging/debian/install

 /usr/libexec/saturnin-demo/saturnin-demo-dump
 /usr/libexec/saturnin-demo/saturnin-demo-echo
 /usr/share/doc/saturnin-demo/README.md
+/usr/share/saturnin-demo/help
 /usr/share/saturnin-demo/ini.d/main/echo.ini

packaging/template.spec

 %dir %{_libexecdir}/%{name}
 %doc %{_docdir}/%{name}/README.md
 %{_bindir}/%{name}
+%{_datadir}/%{name}/help
 %{_datadir}/%{name}/ini.d/main/echo.ini
 %{_libexecdir}/%{name}/%{name}-dump
 %{_libexecdir}/%{name}/%{name}-echo

src/help.skel

+This is just Saturnin demo; it won't do anything useful.
+
+Fun fact:  This text comes from file '__SATURNIN_SHARE__/help',
+as dictated by value of SATURNIN_META_HELP environment variable