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.

Refactored phpdoc to separate Phing task; exclude more files from documentation list to work around bugs.

More granular create_date to prevent distinct operator from merging together rows that should be separate (thanks to Luke O'Sullivan for the fix).

Also fixed bug that was breaking alphabet list display, and fixed an outdated comment.

- Decoupled record drivers from tab rendering
- Every record tab now has a corresponding class and template
- Record driver => tab mapping is handled through module.config.php
- Added some missing comments to existing code

Switched to dependency injection for cleaner WorldCatIdentities/WorldCatTerms recommendation modules.