toolchain: abort if raspberrypisd is not run as root
tvheadend: disable libav, add conditional dvbcsa support
bcm2708: upgrade linux to 3.6.11+e3f09be5f6
firmware-arm-raspberrypi: upgrade to 5dd9b4962e
raspberrypi-userland: upgrade to 5e9a740a88
docs: update supported platforms list