Tests needed: aggregator.admin.inc

This information is from the code coverage report (see http://coverage.cwgordon.com/coverage).

We need to test:

1) The aggregator administration page with categories added.
2) Entering invalid feed urls.
3) Adding more than one feed.
4) Attempting to add two feeds from the same source.
5) Attempting to add two feeds with the same name.
6) Adding sources from the non-administration pages.
7) Aggregator settings form, configuration, and testing of settings.
8) Add aggregator categories.
9) Edit aggregator categories.
10) Delete aggregator categories.