Look at generating persistence for wxPython and wxRuby

[KeyWorksRW]

Description:

Both gen_python.cpp and gen_ruby.cpp have comments about support persistence for that language. I'm adding this as an issue to make it easier to track.

[ ] wxPython does support persistence, though it's more complicated then the C++ version. wxUiEditor needs to support this if at all possible.

[ ] I don't know if wxRuby supports persistence or not -- if it does, then wxUE needs to generate the code to support it.