Unit Testing

[evamaxfield]

The best unit testing for this library would be to have PRs and the auto-build run checks against:

1. ome-types -- just load the produced XML into an OME object
2. BioFormats xmlvalid -- in bash, run xmlvalid against the produced XML file
3. if possible, headless load of a fully converted CZI to OME-TIFF in FIJI