This stapler module creates a Guice Injector automatically from all the jar files in the classpath
by using Extensibility API.
This is the barebone service needed to create an extensible application that follows the extension point / multiple implementations" paradigm.
The application should define a WebAppMain class that extends from ExtensibleWebAppMain,
which designates the Guice singleton component that gets bound to the top of the URL space.
In addition, all the @Extensions that implement Startable interface gets started.