Update readme

Author: cursedcoder

README.md

@@ -15,7 +15,8 @@ Features
 * inter-process communication between childs-parent using unix sockets
 * simple serialization for objects(jms serializer), arrays, scalars
 * async events driven flow (react eventloop)
-* integration with a frameworks, see `EProcess\Application\ContainerApplication` for Symfony
+* integration with frameworks, see `EProcess\Application\ContainerApplication` for Symfony
+* child workers can have own child workers (i.e. `main -> worker -> worker ...`)
 
 Example explain features
 ========================