Add simple mixin to identify collection membership.
Merge pull request #148 from sul-dlss/collection-members

Add simple mixin to identify collection membership.
renames hoover archive constants and image
Merge pull request #151 from sul-dlss/hoover-archive

renames hoover archive constants and image
Add DisplayType concern to SolrDocument to identify which partial to display.
Override BlacklightHelper #document_partial_name to use SolrDocument#display_type.
Move index/show partial suffix to marc.
Merge pull request #149 from sul-dlss/object-behaviors

Add facility for object specific behaviors
adds course reserve access point
Refactor catalog index access points logic into smaller methods and add exlicit return values.
adds tests and handles no results