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

Improved initialization of translator; renamed service to VuFind\Translator; added some missing comments.

Renamed 'logger' service to 'VuFind\Logger' to avoid conflicts; updated all logger-dependent classes to use Zend\Log\LoggerAwareInterface; set up standard initializer for main service manager and other factories.

Made bootstrap lighter-weight by creating factories instead of instantiating services during plugin manager initialization.  Now objects are instantiated on demand.

Prefixed plugin manager service names with "VuFind\" as first step toward best-practice naming for global services.

More appropriate abstraction (throw exception instead of dying with non-object error if table manager not assigned).

Changed statistics driver plugin manager to return non-shared instances; eliminated explicit cloning.

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

Eliminated [GoogleSearch] setting (search API is now deprecated and should no longer be used -- no reason to support in VuFind 2); created central method for storing warnings in \VuFind\Config\Upgrade (for easier debugging, etc.).