awesome-php.md

 * [Procrastinator](https://github.com/lstrojny/Procrastinator) - A library for running time consuming tasks.
 * [Compose](https://github.com/igorw/compose) - A function composition library.
 * [Nod](https://github.com/filp/nod) - A notification library (e.g. Growl).
+* [SuperClosure](https://github.com/jeremeamia/super_closure) - A library that allows Closures to be serialized.
 
 ## Official APIs