Minor Bootstrap 2 style upgrade for search controls.
Add checkbox facets to advanced search screen.
Turned on Summon in test fixtures for better coverage.
Summon advanced checkbox facet support.
- On by default, with upgrade support + test
Merge branch 'master' of https://github.com/vufind-org/vufind
Removed deprecated JSON update handlers.
ChoiceAuth: store user's choice in session.

This will be useful for future things and also fixes a bug wherein login
errors were appearing when a logged-in user navigated to MyResearch/Home
ChoiceAuth proxying expansions & fixes

proxy logout methods
new method proxyAuthMethod
renamed class var 'method' to 'strategy' to avoid confusion
style, doc fixes
Bootstrap advanced/checkbox-filters theming.
Created special "clear followup, then login" action.
- Eliminates some problematic edge cases.
- See VUFIND-982.
- Thanks to Anna Headley for much of the development work.
Fixed link.
Set proper headers on Cover Images so they can be cached by the browser
Merge pull request #161 from zsrlibrary/browser_cacheable_cover_images

Set proper headers on Cover Images so they can be cached by the browser
Add configuration notes and pipe startup output to /dev/null to avoid nohup.out files
Merge pull request #155 from vufind-org/advanced-checkboxes

Advanced checkboxes
Merge branch 'master' of https://github.com/vufind-org/vufind
Duplicate breadcrumbs in VuDL when using Solr connector fix.
Allow INDEX_OPTIONS to be set via an environmental variable
Advanced checkbox restyling to seperate it from the filters below.
Advanced checkbox restyling to put the box in the right place.