[PATCH 0/3] Automatic tag-based exclusion

[Austin Clements]

This implements essentially the same idea as Jamie's patch, but does
it in the library/CLI and operates on the parsed query rather than
using an ad hoc regexp.  Which tags are automatically excluded is set
in the config file and defaults to "deleted" and "spam".

My comment for the config file is clunky.  I'd love suggestions for
improvements.

The first patch can be applied without the other two.