NCBO-470 added LANG=C to speed up grep execution
NCBO-536 split model loading to avoid large SPARQL filters
NCBO-536 test suite with different loading sizes
Unique reference loading does not apply across slices

Avoid test_unique_object_references test when using small slices.
NCBO-473 handle dependency delete - avoid exception
Add pry to gemspec
Merge branch 'staging' January Release
Lock file update