3dir Dynamic Download Dir

This is 3Dir: an extension that dynamically moves/renames your downloads to directories according to your specified criteria.

This is a pre-alpha release. It does only 1 thing:
- always moves your download to a folder named the same as the domain name of the download's URL, i.e., essentially a downloads router within your local downloads directory.

This has been tested for normal binary downloads and for webpages downloaded using the "Save Page WE" Chrome extension. CTRL+S behavior is not overridden.

One option is available to specify whether all domain directories should go into a top level directory named "3dir".

Feedback is welcome: do it at the project's GitHub page (click Website ->).