Adds additional use case reported in #12

Author: hlapp

README.md

@@ -27,6 +27,10 @@ getting a node to "run" (i.e., Node-RED invoking the constructor for the
 node type) is to add it to a flow, whether one that exists or one that you
 create from scratch programmatically.
 
+Another use case would be to programmatically control which nodes are available
+in the palette, by disabling after startup those that are undesired or unneeded.
+See [node-red/node-red#1221](https://github.com/node-red/node-red/issues/1221).
+
 ## Installation
 
 ```
@@ -195,4 +199,4 @@ Available under the [MIT License](LICENSE).
 [#1168]: https://github.com/node-red/node-red/issues/1168
 [#902]: https://github.com/node-red/node-red/issues/902
 [#698]: https://github.com/node-red/node-red/issues/698
-[embedded Node-RED]: http://nodered.org/docs/embedding
+[embedded Node-RED]: http://nodered.org/docs/embedding