Log Message:
Update to Transmission-2.12.

All Platforms
    Make the blocklist URL user-configurable
    Several minor bug fixes and CPU speed improvements
    Use slightly less bandwidth in DHT messages
    Fix 2.10 build issue on uClibc systems
GTK+
    Fix 2.11 crash when opening the Properties dialog on a magnet link torrent
    Fix 2.00 regression which failed to inhibit hibernation on laptops
Qt
    Fix 2.10 build issue on Ubuntu
CLI
    Fix 2.10 crash
Web Client
    Upgrade to jQuery 1.4.3
    Fix 2.11 regression when using the web client on IE7 or IE8