adds file-item specific mods templates
Fix empty 'Available online' panel
Merge pull request #171 from sul-dlss/file-item

adds file-item specific mods templates
Merge pull request #175 from sul-dlss/online-panel-fix-take-2

Fix empty 'Available online' panel
Remove empty access panels column for image collections.
Enable 'Digital collections' link on home page.
Merge pull request #180 from sul-dlss/image-coll-panels

Remove empty access panels column for image collections.
Merge pull request #181 from sul-dlss/collections-link

Enable 'Digital collections' link on home page.
adds views for collection access-point
adds specs and integrates #173 methods