Pcore for Java

This is an implementation of the Pcore specification written in Java. It is work in progress at this point.

TODO:

• More tests needed to reach 100% code coverage
• Type.normalize() not fully implemented yet
• Optimize instanceOf (relies to heavily on infer now)
• A better README.md (obviously)
• More extensive Javadoc
• Examples of usage
• Cross-language integration tests (Ruby/Clojure)