rename test var for clarity
ldp_to_oa_mapper factor out map_external_ref method so it can be used for bodies as well as targets
ldp_to_oa_mapper handles external uris for bodies as well as targets
ldp_to_oa_mapper: factor map_content_as_text into its own method and don't hardcode which triples to map; refactor a few similar specs to make them clearer, better and smaller
revised some vcr cassettes (expired?)
add integration spec for body blank node content as text with diff triples
Merge pull request #76 from sul-dlss/body-ext-uri

can load bodies of external URIs; can load bodies with contentAsText with arbitrary triples