Fix detail view for events.

This was a combination of properly instantiating the generic view
correctly and the problem from 58b7006.
Fix detail view for projects.

The template was missing (so it actually didn't work on the live site
either) and the generic view class was used the wrong way. The new
template is copied over from the calendar module.
Fix archive view of 'rss' app.

Which is to say, the list of recent wiki changes. This does appear
not to be used anywhere, but there you go...