Magnet Link and .torrent to Transmission wot Borja Penuelas

With this extension, clicking a Magnet Link or a link to a .torrent file will send the torrent to your Transmission Server.

- Replaces the default behavior when clicking torrent links.
- Default behavior can still be used with right click or mouse-wheel click.
- A message confirming whether the torrent was successfully added is shown.
- Click the extension button to open the Transmission Web Interface.