sul-dlss/spotlight — pull request #701 by cbeer (2014-06-23 14:59:01+00:00)
Title: Extract an ActiveModelConcern from Spotlight::SolrDocument

ActiveModelConcern has a lot of boiler-plate to make SolrDocument work
nicely with associations and 3rd party libraries. Extract it into a
separate concern to clarify what the important Spotlight-specific bits
are.