[occjava] adding some feature

[dzufferey]

First, thanks for doing this occjava. I use it and did add some extra features needed for my project. Maybe other people would find these useful, so here is a pull request.

One caveat. Except for one thing, everything is new. What is not knew is the handling of c++ exceptions. That code was mostly already there but commented out. I guess that you had a good reason to comment it out so, you may want to skip that commit. I can update the pull request if needed.

[jeromerobert]

At first glance it looks good. I'm sorry I do not have time to look at it in deep right now, but for sure I'll do as soon as possible.