Better Category Browsing

I have optimized the Syndic8 Category Browser — it is not longer dog-slow (sorry, all fast dogs). I did some database tuning, and I used SmartCache to reduce the need to hit the database.

I also added OPML and OCS feeds to the category browser. You can get a list of all feeds in the category, or in the category and all child categories. For example, you can go to Science and pull down a list of the feeds in the Science category and the 9 child categories all at once.

The same child access functionality has also been added to the GetFeedsInCategory function, for those accessing Syndic8 via the Web Services Interface.