Edge orientation information was previously not being included in the API, and therefore, not passed to the UI. This PR parses SBOL SequenceAnnotation for orientation specifications and adds it as a parameter in the D3 graph API.
parses explicit and implicit SBOL for edge orientation
changed Edge orientation from String to Orientation object
added new constant "undeclared" for implicit orientation
Edge orientation information was previously not being included in the API, and therefore, not passed to the UI. This PR parses SBOL SequenceAnnotation for orientation specifications and adds it as a parameter in the D3 graph API.