Allow some advanced search elements to be overridden.
- Will be used by forthcoming EDS implementation.
Added mechanism for suppressing display of certain filters.
Added mechanism for applying default filters.
- Resolves VUFIND-505.
Pre-apply default filters to advanced screen for better user control.
Character set declaration should be as early as possible in code.
- Helps avoid Firefox double-load glitch in some cases.
Added limit settings to Primo.
Fixed backend limit bug in Primo.
Made description searchable.
Avoid notice.
Eliminated notice.
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