LdpToOaMapper.map_choice implemented with unit tests
add fixture for target choice of three image urls
LdpCreator unit specs pass with Choice allowing ContentAsText or external URI items
ldp_to_oa_mapper.map_choice now copes with multiple item urls
update vcr cassettes for Triannon_RootAnnotationCreator
update vcr cassette for features_annotations_index
update vcr cassettes for integration tests for annos with content as text
refactor attribute and method names in annotation_ldp
update vcr cassettes for integration tests for annos with content as text
add specs for LdpLoader retrieving triples about external targets
update vcr cassettes for integration tests for annos with content as text
added integration tests for Choice
Merge pull request #82 from sul-dlss/choice

Choice implemented in LdpToOaMapper/Loader