Feature #333

Updated by pospelov about 7 years ago

To support new beam polarization features from python.

So far only found this
* https://github.com/jorisv/Eigen3ToPython
* http://code.google.com/p/ndarray/source/browse/branches/eigen3/boost.python/?r=119#boost.python%2Feigen%2Fboost%2Fpython%2Feigen

But fortunately we don't need whole glory of eigen3 in python, it will be enough to have on the fly conversion of certain type of eigen matrix to/from numpy array (similarly as it is done for OutputData class)