SBOL support in OVE

[mfero]

@tnrich This is s stub for the SBOL support ticket
@jakebeal will join this repo and contribute

[jakebeal]

This might be fairly easy to support at a basic level, as https://github.com/SynBioDex/SBOL-utilities has an sbol-to-genbank converter that can be run from python or the command line to convert between SBOL3, SBOL2, GenBank, and FASTA.

The key things to do would be:

1. Searching the SBOL3 document for Component objects with type=DNA (maybe also RNA or amino acid if you support those too?)
2. Keeping some breadcrumbs back to the original SBOL3 object and the document it's stored in to avoid destroying more information than necessary, since down-conversion to GenBank is lossy.