The default implementation of PTypeInfo now checks whether an object is a Java array and will return its component type if true.
Merge pull request #197 from hokkaido/develop

The default implementation of PTypeInfo now checks whether an object is ...
refactor dataset function
commented out blocker for NDArray loading
stub for label function
extra labelling functionality and tests
Add MTJ known implementation.
Merge pull request #199 from sethyuan/develop

Add MTJ known implementation.