New pybindgen and API rescan.  Extensive API description files changes because pybindgen now handles consts differently.

Require new PyBindGen (now ignores the badly scanned anonymous containers that cause problems on cygwin) and rescan API.

New PyBindGen version and API rescan: adds missing copy constructors, and generates __copy__ methods so that python's copy.copy() works on our objects.

Make copy constructors of some wifi classes private so that pybindgen won't use them (they are not usable)

Python: ignore TracedCallback classes for the time being: they were never usable and were triggering pybindgen generate code compilation problems.