Add buildout files for testing.
cleanup setup.py
Nuke trailing white space.
pyflakes
Use zope.component instead of most z.a.component and zope.location.

We do stil need zope.app.component for queryNextSiteManager.
But that function has been deprecated since 2006, so we should replace it.
zope.app.interface is no dependency anymore.
We depend on ATContentTypes and Archetypes.
Replace z.a.container with zope.container.
Replace zope.app.pagetemplate with zope.browserpage.

This means we lose Plone 4.0 compatibility.
Well, we add zope.browserpage to our dependencies, so it can still work,
zut zope.browserpage is not officially part of Plone 4.0.
zope.container is a test dependency
Remove empty viewlets.xml
Test with latest Plone 4.x.
Add note on KSS support.
todo
Only log at debug level in our exportimport.

Otherwise the 'not installed' message gets printed lots of times when creating a Plone site.