Zope-location

==================

- Add zcml extra as well as a test for configure.zcml.

==================

- Move LocationCopyHook related tests to zope.copy and remove a test
dependency on that package.

==================

- Fix a typo in the configure.zcml.

==================

- Remove dependency on zope.copy: the LocationCopyHook adapter is registered
only if zope.copy is available.

- Use the standard Python doctest module instead of zope.testing.doctest, which
has been deprecated.

==================

- Adjust to testing output caused by new zope.schema.

==================

- Move the IPossibleSite and ISite interfaces to zope.component as they are
dealing with zope.component's concept of a site, but not with location.