Configure about page URLs for SAL3 and SAL-NEWARK.
Return JSON error when a library does not have a configured HOURS API.
Fix Engineering hours/library configuration.
Add partial to display location (holdings) information on search results.
Merge pull request #333 from sul-dlss/library-links

Add link configuration for SAL3/Newark and return 'No public access' for non-configured libraries
Merge pull request #318 from sul-dlss/results-holdings

Add partial to display location (holdings) information on search results.
Add concern for handling extent labels and values.