add C++ and Python support

Once semcode (after PR#50) is able to better deal with having multiple functions of the same name, it is not a large step to extend semcode functionality to cover object oriented languages, where every class is likely to have some functions of the same name, e.g. __init__ in every Python class.

Adding support for object oriented languages can be built on top of handling, and being able to select, multiple functions of the same name.