Basic support for Java 9 modularization

[BGehrels]

See:

• https://dzone.com/articles/automatic-module-name-calling-all-java-library-maintainers
• http://blog.joda.org/2017/04/java-se-9-jpms-module-naming.html
• http://blog.joda.org/2017/05/java-se-9-jpms-automatic-modules.html

[ePaul]

Hmm, we need to see how this works with our approach of having the same package in multiple jars.