Multi-Release JAR runtime support

[mark.reinhold at oracle.com]

2016/4/19 12:37:41 -0700, Hervé BOUTEMY <herve.boutemy at free.fr>:
> that's it: I added this Multi-Release: true attribute configuration in the 
> demo and now it works like a charm, thank you
> 
> Perhaps this requirement should be described in 
> http://openjdk.java.net/jeps/238

Yes -- that was certainly non-obvious!

Steve, could you please add this to the JEP?  (A JEP should, in general,
contain and/or refer to enough information for an experienced developer
to get started using the feature.)

Thanks,
- Mark