Collection of backports and utilities for apps and libraries

 backport9 is a collection of backports and utilities to support libraries and
 apps that want to use Java 9 features but still function on Java 8.
 .
 Modules is a light shim library that wraps Java 9 and previous reflection APIs
 to allow a uniform API into "module"-like behaviors on all recent JDKs.
 .
 Buffers is a binary-compatible calling shims for java.nio.Buffer and
 subclasses.
 .
 Stack is a look-alike wrapper around the Java 9 StackWalker API with Java 8
 support.