add blacklight_oai_provider?

[ebenenglish]

this is a placeholder ticket

In our grant application, we indicated that this project would

facilitate sharing of metadata and image content via standard APIs.

facilitate improved sharing of newspaper content between repositories and with aggregators such as DPLA, by providing a community-supported data model and a standardized protocol for making content harvestable

We should discuss adding blacklight_oai_provider and customizing an OAI output profile that supports the above.