More details on worker process scripts

Author: kuhnza

README.md

@@ -101,6 +101,7 @@ of all it's okay to write blocking code in the workers. It's what they're
 there for. 
 
 There are some important things to note however:
+
 1. Always include final line in the example worker above. Without it the parent 
 process won't know that the worker has started successfully. Also ensure that it's
 the very last thing to execute upon initialization so that you can confidently 
@@ -110,7 +111,8 @@ code has completed.
 2. process.on('message'... must be present in order to receive jobs from the parent.
 3. process.send(result) must also be present as the final step of your processing
 to send back the result and notify the parent process that the worker is ready for
-more work.
+more work. If this isn't present or never gets called due to an exception etc., your 
+worker won't be available to receive any more work and will effectively hang.
 
 
 Controlling the Number of Workers