Initial bug fixing and modifications.

+ Added option to set browser icon add/dup/fail timeout.
+ Updated to JQuery v1.9.1.
+ Add file priorities in torrent download popup (credit to Florian Unglaub).
* Changed to manifest version 2.
* Clicking on .torrent link when download popup is disabled will not download the file, just send a link to transmission.
* Fix downloading .torrent file as blob (fixes issue with torrent download popup).
* Updated sendRequest/onRequest to sendMessage/onMessage (new API in Chrome ~v20+).
+* Probably a few other minor things.