Support multiple settings/sites

[pombredanne]

Motivation

I have repos like https://github.com/nexB/purldb/ that hosts multiple django projects (and therefore settings) but has only a single documentation published on RTD https://purldb.readthedocs.io/

I cannot point this plugin to my settings

Proposed Solution

I would like to provide a list of settings

Alternatives

I would have to completely refactor my documentation in multiple docs sub-directories which would not any functional sense.