Generating multiple feeds per collection

[rsdoiel]

I'd like to be able to generate more than one feed per collection. As an example a collection functioning like a blog would want a feed for recent posts but also have another feed for archive of all posts.

This implies a more complete collection definition, maybe one that has an output name and filter function per feed in the antenna YAML file. The suggests I need a command line vocabulary to easily work with adding and removing filters per feed file.

When the generate command is run then all feeds are rendered related to the current collection.