Heap memory cleanup

[d47081]

As PHP send object creation request to CPP, what about (heap) memory cleanup there?

I mean delete operation for every new widget construction

[scorninpc]

We have some issues about it, but all teorical universe

#81 (here we implement some things to try some tests)
#42
#151

Have you facing some problem?

[d47081]

No, not facing

Introduction to Memory Management in GTK+ looks useful for manual management,
but here is another way, by gtkmm wrapper for C++ Chapter 25. Memory management - Gtk::make_managed()

Suppose it could be much useful for PHP implementation