Validate create library workflow

[jakebeal]

The simplest workflow for Excel-to-SBOL is creating libraries of basic parts.

The workflow goes: create spreadsheet --> run tool --> output is SBOL document.

We need to check to make sure that this workflow is actually working, and support that via tests.

[jakebeal]

Need to produce the SBOL from the current small test file, check it in SynBioHub and then, once satisfied, save it in the repository for comparison.

Try it with sorted n-triples, and fall back to XML if that fails.