Removing unused blacklight overrides.  Only keeping the ones we need to change blacklight default behavior.
Pinning respec to 2.99
Merge pull request #490 from psu-stewardship/remove_overrides

Removing unused blacklight overrides.  Only keeping the ones we need to ...
making new office document thumbnails visible.
Merge pull request #479 from psu-stewardship/office_docs

making new office document thumbnails visible.
Screen reader should say 'items' #485
Updating modals and fixing facet features #428
Merge pull request #487 from projecthydra/issue_428

Dashboard modals, rspec versions and screen reader
Added additonal span and classes to fix thumbnail image hogging column and refactored HTML/CSS. fixes #SCM-9283