mbari-media-management/annosaurus: annosaurus 0.9.2

I've added a new endpoint (as requested by CSIRO) for retrieving imagedMoments that have at least one image (i.e. ImageReference) and that have an Association that matches the user-provided toConcept. The endpoint is:

http://my.annosaurus.org/anno/v1/fast/imagedmoments/toconcept/images/{concept}

It returns a list of ImagedMoment UUIDS:

[
  "9c1cef8a-aed6-469d-accb-04c3aa82e3b1",
  "70f807b7-1cdd-4023-8c32-0ee3d80a4f32",
  "43e02cd8-41dd-4b97-a437-0f34a9cb3daf",
  "c8d54faa-91be-410a-9d2a-1c6ea2b8fa90",
  "ee26d184-4759-4fe4-a47f-3a621878fdc5"
]

This release also includes a bug fix for a rare NullPointerException that could occur if an association was missing a linkValue.