No longer depend on `zope.app.locales`. Zope2 uses almost none of the translations provided in the package and is not required for most projects. The decision to include locales is left to the application developer now.

Removed the dependency on `zope.app.testing` in favor of providing a more minimal placeless setup as part of ZopeTestCase for our own tests.

like docutils *SIGH*

Adjust the Zope 3.5 documentation to point to the Zope Toolkit instead. Also use Zope 2 instead of Zope2 throughout.

o Preserve response class as well.

Merged the two versions files into one. There's currently no maintained Zope Toolkit KGS we could reuse.