Rearranged test suite -- moved ResultFeedTest to integration tests since this relies on live Solr instance.

* tests/unit-tests/src/ILS/Driver/SymphonyTest.php
(testBadBaseUrl): Skip test if PHP version < 5.3.4.

Refactored Auth plugins to avoid dependence on generic ServiceLocatorAwareInterface; injections are now more targeted for clearer dependencies.  Also added some missing comments.

Use explicit dependency injection for ILS authentication module instead of relying on service locator.

* tests/unit-tests/src/RecordDriver/SolrMarcTest.php (testBug2): Load
  fixture, instantiate record directly.

Split searchspecs reading away from standard config reader; made new class non-static for service manager integration; updated tests to match.

Search results objects' getRecord() / getRecords() methods are no longer static (to allow service locator integration).

1. fixed bug where Search Manager would load incorrect objects because state had been changed in between calls (i.e. $params object may use Search Manager, changing its state before $results object can be created -- to avoid, we need more explicit calls to setSearchClassId())

2. refactored record drivers in preparation for plugin manager (moved constructor parameter to setRawData method).  This allowed more common functionality to be moved to the abstract base class.  Renamed getAllFields() to getRawData() for consistency.

Small bonus change: turned off highlighting/spellchecking/recommendations in BrowseController for improved performance.

Upgraded to latest ZF2 release (RC7); uncommented VuFind features that were waiting for functionality introduced in this release.

Refactored authentication interface for compatibility with plugin manager (moved configuration setting from constructor to setConfig() method).  Added some partial unit tests for uncovered authentication methods.

Changed ILS driver loading sequence for more flexibility.  No hard work is done in the constructor; instead there is an init() method that gets called by the VuFind\ILS\Connection class.  Additionally, drivers no longer load their own configurations; instead, configs are pushed in by VuFind\ILS\Connection, making reuse easier in other contexts.  Finally, ILS drivers all inherit from the same base class, easing future functionality.

PICA configuration now includes copy of DAIA settings -- this avoids the need to load two separate configs when using PICA.ini

Fixed a Symphony namespacing bug.

Stub tests have been added for all existing drivers, though they do not cover much code yet.

Added unit test for ILS authentication; made ILS authentication module more testable (with optional dependency injection) and less error-prone (isset checks to avoid notices).

Got RSS feeds mostly working; there is currently a problem with Dublin Core data from early entries bleeding over into later entries, but this may be a problem with the underlying framework rather than VuFind-specific code.

Added ChangeTracker row object and accompanying test (but it doesn't work yet due to underlying limitations of ZF2).

Allow optional injection of configuration to Date Converter for cleaner unit testing; added unit test.