- A logic problem caused tideways profiling to be always enabled if the extension was loaded

- Maintains functionality while eliminating the need to add xhprof_lib to the PHP include path.

- Update version numbers
- Remove "vufind2" references from default paths/package.

- Introduce DEFAULT_SEARCH_BACKEND constant.
- Deprecate now-redundant getResourceSource() record driver method.
- Implement upgrade functionality to adjust database.
- Resolves VUFIND-1139.

- First step in "VuFind" source cleanup; see VUFIND-1139.

* added VUFIND_CACHE_DIR environment variable to httpd-vufind.conf
* VUFIND_CACHE_DIR now being used for custom cache directory
* CacheManager will throw an exception if cache_dir is set in config.ini

- Avoids use of __DIR__ (which doesn't work properly with symlinked files).
- Also use APPLICATION_PATH in theme base directory.
- Fixed line lengths in index.php.