except under Python 2.6.
    
  N.B.  This change is an ABI incompatibility under Python 2.7:
        extensions built under Python 2.7 against 4.0.x versions of
        ``zope.proxy`` must be rebuilt.
  
Bump target version to '4.1.0' to signal BBB issue.

Enable compilation of dependent modules under Py3k.

Folks who need that hiding have to stick to CPython.

Now that we have the gnarly '__getattribute__', we *can* tell that lie.

Python 2.7 adds B&D checks which break for the C wrapper.

This version passes all tests except the one which asserts that the proxy
can lie about its '__class__', which can't be done in Python.

Move narrative doctests out to Sphinx.

Convert non-narrative doctestss to unittests.

Move doctest examples to API reference.

Installs 'Sphinx' and dependencies.

Runs 'setup.py develop' plus installs 'nose' and 'coverage'.

Replace deprecated 'zope.interface.implements' usage with equivalent
'zope.interface.implementer' decorator.