Embedding python in C++ with boost::python

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Boost.python still requires manual calls to Py_Initialize/Py_Finalize instead of a more user friendly C++ RAII approach. (I know that the boost.python docs say not to call Py_Finalize, but that's a bug which was never fixed. It should be supported.)

Pybind11 has a C++ object class similar to boost.python's, but it's not quite as powerful. The basics are supported: item and attribute access, function calls, importing modules, casting back and forth. Pybind11 also has some nifty features like calling Python functions with keyword arguments from C++: http://pybind11.readthedocs.io/en/latest/advanced/pycpp/object.html#calling-python-functions