Use breeze functions in Java with Array[Double]s?

Hi David,

Is this something you find meaningful for Breeze?

It is an object/static class that allows breeze.signal functions to be used easily from Java (and hence from MatLab/Mathematica/etc), without the implicits and returning double[] objects, which both MatLab and Mathematica can automatically translate to native objects.. It is useful for me, because I do the bulk of my Java/Scala work via Matlab and Mathematica, and it might be useful for others as `breeze.signal` becomes more complete, since there are no real standard DSP packages for Java to date!

If you agree, I will complete it for `breeze.signal`, and work on `breeze.linalg.J` as well, which contains a lot of good stuff.

Kenta