more specific selector for .document book cover
Merge pull request #250 from sul-dlss/book-selector

more specific selector for .document book cover
Add OSD dependency and include all helpers/assets.
Make mods upper metadata section dl-invert to be consistent w/ mods.
Merge pull request #248 from sul-dlss/osd

Add OpenSeadragon viewer for stacks images
install blacklight-gallery plugin
initial setup of gallery view
adds preview button
Merge pull request #252 from sul-dlss/gallery-view

Result Gallery view
installs advanced search gem and run generator
adds advanced toolbar with active class helper
adds default functionality to adv search
begins to add integration tests
Merge pull request #223 from sul-dlss/adv-search

Advanced Search
initial work on preview controller
Remove OSD viewer in preview output for image & merged-image
update previews and add specs
Merge pull request #255 from sul-dlss/preview-controller

Preview controller work
Add image preview
Add previews via new preview controller