Fixes to the DT field type

Use the FEU username (optionally) so that we can track when a logged in user uploads a file

Add filetype capabilities to associate an icon with a particular upload. Also support an unknown file type for anything that does not match.

Completely re-worked the multiple database template stuff.

Adjustments to the default templates

Fixes to using category="all"

Generate thumbnails automatically (optionally) for certain file types, on upload, and on scan.

Add captcha support to the upload form

Add a safe mode warning in the admin panel

Uses chunked downloads.

Adds prefix and prefix_feu capability to uploaded files.

Added the detailpage param.

Added the ability to display an image in full size (or whatever size we want), so that the uploads module can be used as a gallery.

Added security (via the FrontEndUsers module) to categories

Added a select mode to generate a pulldown of files in a category, for use when attaching uploads module to some other module.