updating JNI wrapper to v3 API; minor update to documentation in  Beagle.java
updating JNI wrapper to v3 API; minor update to documentation in  Beagle.java

beagle-dev/beagle-lib,beagle-dev/beagle-lib,beagle-dev/beagle-lib,beagle-dev/beagle-lib,beagle-dev/beagle-lib