Added symlink support, tweaked usage message

.todo.actions.d/adda

@@ -4,9 +4,10 @@ action=$1
 shift
 
 [ "$action" = "usage" ] && {
-  echo "  Customized add:"
-  echo "    adda  \"THING I NEED TO DO +project @context\""
-  echo "      add an item and prioritize it A in one step"
+  echo "  Add and prioritize A:"
+  curcmd=`basename $0`
+  echo "    $curcmd \"THING I NEED TO DO +project @context\""
+  echo "      Add an item and prioritize it A in one step"
   echo ""
   exit
 }