Unified RSS Services to use 1 service

Hello,
So instead of using n services which poll YQL for an rss, I modified the RSS Service to be compatible with any feed we currently have (and hopefully anything you might throw at it). 

* removed superfluos rss services
* moved rss service favicons in subfolder
* favicons are grabbed dynamically (though you can disable this)
* added documentation for RSS "Recipes"
* removed formspring (now sprin.me, no RSS anymore)
* removed posterous (closed)
* updated Facebook page example to Ars Technica (old ID was no longer valid)

Also, the `author` object is rather preliminary, until I have a chance to bring the templates in to the global settings.

And yes, using *James Bond* as a placeholder seems pretty corny in retrospect and I hope you have a better idea.