further devel of highlight handling

adjust configuration sources accordingly
move SearchBindings.py into the attic now

plus misc fixes cleanups for new config system

starts with "-psn_". This means the drag-and-drop continues to work as
expected, but we can now also do
/Applications/Python.app/Contents/MacOS/python script.py
from the command line, which is a lot easier with debugging. Pressing <option>
at this point also has the expected effect of opening the options dialog!

- fixed GetThemeTextDimensions(): it has an in/out Point arg, not just out.

- Added a bunch of calls as functions with an optional
  MenuObj first argument. The same calls already
  exist as methods, but then the first arg isn't
  optional... The method versions could go as far as I'm
  concerned. Jack?

Added some support for Uicode arguments. Still leaves something to be desired, especially because of poor unicode support in PyArg_ParseTuple.

Test that the file methods raise ValueError when called on a closed file.
Test .isatty()
Test name, closed attributes

This makes xreadlines behave like all other file methods
(other than close() which just returns).

as Carbon-only

    - ctl.SetControlAction()
    - CreateScrollBarControl()
    - CreateSliderControl()
- print traceback when callbacks fail

test_complex:  repair new test's usage of vereq().

the finally clause.  An exception here could happen when a daemon
thread exits after the threading module has already been trashed by
the import finalization, and there's not much of a point in trying to
insist doing the cleanup in that stage.

This should fix SF bug ##497111: active_limbo_lock error at program
exit.

2.1.2 and 2.2.1 Bugfix candidate!