Allow for placing addons in subfolders.

Addons can be placed in subfolders with the same name as the action,
in order to be able to e.g. clone git repos into the TODO_ACTIONS_DIR
rather than having to download addons and manage updates manually.

Closes #120

todo.sh

@@ -302,6 +302,14 @@ addonHelp()
                     didPrintAddonActionsHeader=1
                 fi
                 "$action" usage
+            elif [ -d "$action" -a -x "$action/$(basename $action)" ]; then
+                if [ ! "$didPrintAddonActionsHeader" ]; then
+                    cat <<-EndAddonActionsHeader
+		  Add-on Actions:
+	EndAddonActionsHeader
+                    didPrintAddonActionsHeader=1
+                fi
+                "$action/$(basename $action)" usage
             fi
         done
     fi
@@ -314,6 +322,8 @@ actionUsage()
         action="${TODO_ACTIONS_DIR}/${actionName}"
         if [ -f "$action" -a -x "$action" ]; then
             "$action" usage
+        elif [ -d "$action" -a -x "$action/$(basename $action)" ]; then
+            "$action/$(basename $action)" usage
         else
             builtinActionUsage=$(actionsHelp | sed -n -e "/^    ${actionName//\//\\/} /,/^\$/p" -e "/^    ${actionName//\//\\/}$/,/^\$/p")
             if [ "$builtinActionUsage" ]; then
@@ -964,6 +974,10 @@ then
     shift
     ## Reset action to new first argument
     action=$( printf "%s\n" "$1" | tr 'A-Z' 'a-z' )
+elif [ -d "$TODO_ACTIONS_DIR/$action" -a -x "$TODO_ACTIONS_DIR/$action/$action" ]
+then
+    "$TODO_ACTIONS_DIR/$action/$action" "$@"
+    exit $?
 elif [ -d "$TODO_ACTIONS_DIR" -a -x "$TODO_ACTIONS_DIR/$action" ]
 then
     "$TODO_ACTIONS_DIR/$action" "$@"
@@ -1405,6 +1419,8 @@ note: PRIORITY must be anywhere from A to Z."
         do
             if [ -f "$action" -a -x "$action" ]; then
                 echo "$action"
+            elif [ -d "$action" -a -x "$action/$action" ]; then
+                echo "$action"
             fi
         done
     fi