Log Message:
Update to 1.3.3:

* Released Tellico 1.3.3.
* Fixed EntryView to honor copy() command properly, for clipboard.
* Updated Porbase URL in z39.50 server list.
* Updated drag-and-drop to allow HTTP urls.
* Changed Arxiv fetcher to remove ID version number for results.
* Fixed bug with merging file catalogs, to properly match on URL.