Move version printing routine to saturnin.sh module

src/bin/satcmd.skel

 SATURNIN_LIBEXEC="__SATURNIN_LIBEXEC__"
 SATURNIN_LIBEXEC_PREFIX="satcmd-"
 SATURNIN_APP_VERSION="__MKIT_PROJ_VERSION__"
+SATURNIN_APP_TAGLINE="__MKIT_PROJ_TAGLINE__"
 
 #
 # =====END BUILT PART=====
             "--version"
 }
 
-version_info() {
-    echo "$(basename "$0") (Spirit of your toolbox) $SATURNIN_APP_VERSION"
-    exit "$SHELLFU_EXIT_OK"
-}
-
 while true; do case $1 in
     -d|--debug)     export SHELLFU_DEBUG=true; shift   ;;
     -v|--verbose)   export SHELLFU_VERBOSE=true; shift ;;
-    --version)      version_info                    ;;
+    --version)      saturnin__version; exit            ;;
     --version-semver) echo "$SATURNIN_APP_VERSION"; exit ;;
     -*)             usage;                          ;;
     --*)            usage;                          ;;

src/shellfu/saturnin.sh

     "$binpath" "$@"
 }
 
+saturnin__version() {
+    #
+    # Print version info
+    #
+    local tagline=${SATURNIN_APP_TAGLINE:-Some app with default tagline}
+    echo "$(basename "$0") ($tagline) $SATURNIN_APP_VERSION"
+    return "$SHELLFU_EXIT_OK"
+}
+
 saturnin__wraphook() {
     #
     # Wrap command "$@" in hooks