process links when enriching
Merge branch 'develop' of github.com:au-research/ANDS-Registry-Core into develop

* 'develop' of github.com:au-research/ANDS-Registry-Core:
  crosswalk checking, minor display issue
  registry apps init
  moving registry apps into the core repo
  Rename registry_object_links.url as link
  Adjust registry_object_links.last_checked col type