Fix permissions on Mets.php.
Fix date handling for day granularity and "until."
Restrict added and modified separately.

The previous implementation could return results as long as the added
and modified dates just "straddled" the from and until params.

Ref #8.
Get the true earliest date stamp.
Zendified plugin.
Added an option to change the url of the repository.
Added an option to avoid exposition of empty collections.
Returned only public items.