Adjusted getThumbnail() to return an array of cover generator parameters instead of building a cover generator URL -- this eliminates some ugly dependencies at the cost of requiring a new view helper to properly render getThumbnail() output.

Added cover controller and loader (partially functional); revised theme tools to support requirements of cover loader.

Fixed various problems with AJAX controller (getAccount instead of getAuthManager; methods not returning values; inconsistent/redundant exception handling).

Make sure theme-specific resources load BEFORE additional resources introduced by specific view templates.

Translator fixes: made language initialization a high-priority event; throw Exception if translator not initialized.

Disabled thumbnail generation until we figure out the best way to access the router from the record driver.

Fixed exception namespace issues; commented out database-dependent record driver methods until they are fully implemented to avoid fatal errors.

Created central ViewModel factory method to avoid convoluted bootstrap routine for flash messenger and to provide a hook for adding other global view variables in controllers.

Rolled back change to make auth parameters more generic; we need the full request object to handle subtleties of systems like Shibboleth.