Yelp/mrjob — pull request #408 by irskep (2012-03-24 00:47:13+00:00)
Title: Multiple config files

This pull request addresses #104.

No docs yet, confirming that this is what we want first.

Summary of changes:

* `load_opts_from_mrjob_conf()` returns a list of `(conf_path, values_dict)` pairs instead of just a dict.
* The value dicts from this list are inserted into the `opt_dicts` list to get combined along with everything else.
* Broke some `MRJobRunner` init code into helper functions.
* Tests.