add spec framework to the public app
view model for file versions, and embed templates

load stylesheet for images
force image resizing for firefox and ie
explicitly require exceptions library
remove path to old migrations directory
remove import requirments from Gemfile
add a second sort option
remove remove_title_column logic from views
dry search pagination template a little
sort fields added to table show up in dropdown too
Merge pull request #656 from hudmol/embedded-digital-objects

Embedded digital objects
When creating person/family/corporate agents from authority records, include the unauthorized forms of names too.
Add MARC import definitions for importing subjects from authority records.
Improve handling of import files with no records suitable for import.
Switch parse_queue to use ASUtils.tempfile to avoid race conditions in tests.
quick fix for single_type column hiding logic
Merge pull request #657 from hudmol/authority-import-fixes

Authority import fixes
added refid_rules plugin to dist
don't try to check sorting on nonexistent search data
ensure refid_rule param is set before accessing it from AppConfig