Change Collection to use a behavior.  Issue #65.
Do not use deprecated setQuery in tests.
Put selectedViewFields on the collection view.
Fix syndicatable Collections.

Remove our rss template. Use the one from CMFPlone instead.
Register our own adapter from the ICollection behavior to IFeed.
This is enough to let the CMFPlone rss templates work.
Should also work for other content types that use the ICollection behavior.
Add test for collection behavior on non-Collection.
Add customViewFields to the Collection behavior.

This was available on old collections too.
Enable thumbnail_view for collection behavior.
Enable summary_view and all_content views for collection behavior.

Define collection_view for those types so you can view the results.
These simply show the results.  The normal view of such a type will
just show all fields in the usual dexterity way.
Define Document text field as primary.
Add utf-8 header.
pep8 and pyflakes
Merge pull request #89 from plone/collection-behavior-65

Collection behavior issue 65