ARGO-188: add new style for status field
ARGO-188: modify add_collection_reference call in purl_preview to work w/ newer version of dor-services gem
ARGO-188: add render_status_style method and invoke from html template.  minor whitespace adjustments and a couple explicit returns.
ARGO-188, ARGO-282:  hilight certain status field values for registered and opened objects, upgrade dor-services gem to support hilighting, upgrade mods-display gem since we're already upgrading gems
Merge pull request #2 from sul-dlss/obj_status_hilight

highlight some object statuses