Consolidate has_metadata and has_file_datastream into contains. Fixes #508
Use reflections for storing information about child resources
Grab the file name from the HEAD request now that fcrepo is fixed
Merge pull request #515 from projecthydra/added_contains

Consolidate has_metadata and has_file_datastream into contains. Fixes #508
Merge pull request #522 from projecthydra/file_name_from_head

Grab the file name from the HEAD request now that fcrepo is fixed
Rename Datastream to File. Fixes #518