Update reactive-streams to 0.4.0 final
Merge pull request #451 from smaldini/patch-1

Update reactive-streams to 0.4.0 final
Improve default production error handler to include some identifying characteristics of the request.
Rename some of the potentially ambiguous method overloads in BindingsSpec.
Version 0.9.9
Begin version 0.9.10
Update front page to mention Java 8 requirement.
Java 8ize these examples.
Make this example an executable app.