- Fixed off by 1 bug.  CFIs are even and start at 2, while the list holding the spine items is zero based.
Merge pull request #15 from bibliolabs/develop

- Fixed off by 1 bug.
Some improvements to JNI helper classes, including Method and String access and better Exception handling and throwing.
Finished IRI java class and it's JNI layer.
Merge branch 'feature/txtr-s2-library-iri' into develop