EDS Integration and Ingest Pipelines

EDS Integration:
-- EDS has been integrated with Blacklight using the EDS API.

ingest Pipelines:
-- Opinionated Metadata (OM) vocabularies have been written for Dublin Core and MODS (from Peel).
-- A generic ingester using OM has been written.
-- A proof-of-concept Dublin Core ingest Rake task has been added.

Deployable baseline

This is an Ansible-deployable vanilla instance of blacklight. The Ansible playbook ("blacklight-application") installs base software, then Solr, Nginx, and Unicorn, and loads the Rails application.

Non-deployable baseline

This is an initial, non-deployable commit to give us a baseline to build off of.