The previous implementation used execv(2) to run the real interpreter, which means that
you cannot use the arch(1) tool to select the architecture you want to use for a
universal build because that only affects the python/pythonw wrapper and not the actual
interpreter.
The new version uses posix_spawnv with a number of OSX-specific options that ensure that
the real interpreter is started using the same CPU architecture as the wrapper, and that
means that 'arch -ppc python' now actually works.
I've also changed the way that the wrapper looks for the framework: it is now linked to
the framework rather than hardcoding the framework path. This should make it easier to
provide pythonw support in tools like virtualenv.
1) Add a comment to the help file to that points to the
preferences menu.
2) An earlier checkin tried to detect Tk >= 8.10.14,
but did this in the wrong way. The end result of this
was that the IDLE->Preferences... menu got surpressed
when using the system version of Tcl/Tk
