Adapted language reporting tools from VUFIND-149 as part of module.

Thanks to Mark Triggs for initial research and Kyle McGrogan for implementation work.

Added CollectionSideFacets recommendation module and set it up to be active by default in collection view.

Set up links to collection view rather than record view for appropriate records when collections are enabled.

Resolving VUFIND-590: email now requires authentication by default (to deter spammers), but anonymous emailing can be enabled via config.ini.

Removing VUFIND-160 workaround now that it is no longer needed (thanks to VUFIND-715 Yaml library improvements).

Resolving VUFIND-712 (Inconsistent YAML syntax for search specs QueryFields) and fixing use of escaped slashes in CallNumber munge rules.

Resolving VUFIND-596 (Improvements to handling of previous and subsequent titles on record page (MARC 7xx)).

Resolving VUFIND-635 (Enable SMS record via Clickatell); some additional work may still be needed to get Unicode characters to transfer correctly.

Added console tool to regenerate hierarchy tree cache.  Added more flexible cache lifetime settings to support new tool.

Also fixed bug that was breaking alphabet list display, and fixed an outdated comment.

* Module.php (setup): Use Zend DI for instance configuration.

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.).