added a help in the missing.sh and modified some things

functions.sh

@@ -11,7 +11,7 @@ desktopsearch () {
 iconsearch () {
     local icon_pack=$1
     if [ -z $icon_pack ]; then
-        echo "iconsearch requires a icon pack." 1>&2
+        echo "IconToaster requires an icon pack as an argument." 1>&2
         exit 1;
     fi
 	for icon in $(find ~/.icons/$icon_pack -name '*.png');
@@ -26,7 +26,7 @@ iconsearch () {
 compare_desktop_and_icons() {
     local icon_pack=$1
     if [ -z $icon_pack ]; then
-        echo "iconsearch requires a icon pack." 1>&2
+        echo "IconToaster requires an icon pack as an argument." 1>&2
         exit 1;
     fi
     perl <(cat <<'EOF'

missing.sh

@@ -3,6 +3,11 @@
 # This file is part of IconToaster
 # and it's AGPLv3 licensed.
 
+# Launch this script with an argument containing the icon pack
+# for example, if you want to test aleta, you must write 
+# ./missing.sh aleta
+# Note that for now only icon packs in ~/.icons are testable.
+
 script_path=$(dirname $0)
 script_name=$(basename $0)
 icon_pack=$1
@@ -10,7 +15,7 @@ icon_pack=$1
 . "$script_path/functions.sh"
 
 if [ -z $icon_pack ]; then
-    echo "$script_name requires a icon pack." 1>&2
+    echo "$script_name requires an icon pack as an argument." 1>&2
     exit 1;
 fi