OMERO5.0DEV__2: via git mv and build-schema
OMERO5.0DEV__3: with Image.fileset rather than links
Fix poor exception mapping in PublicRepositoryI
Code modifications for dbpatch 3

Primarily concerned with fixing the graph specifications
for delete, etc in spec.xml and handling the linkage from
and to Image.
Handle null sizes in RepoDaoImpl (See gh-892)
Fix listFiles test (See gh-669, gh-767)
Change .. deletePaths test to use assertRaises
Fix gateway's usage of fileset image links
Fix fileset query in insight
Merge pull request #951 from joshmoore/fs-model-3

OMERO5DEV__3: fileset image linkage