firmware: Move to latest version of vdec3 and venc
See: https://github.com/popcornmix/omxplayer/issues/87

kernel: V4L2: Increase the MMAL timeout to 3sec
See: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=43&t=62364&start=150#p482295

firmware: Change default zoom speed to fastest possible. This means setting ROI takes only one frame rather than doing an animated zoom.
See: http://www.raspberrypi.org/phpBB3/viewtopic.php?f=43&t=65589&p=482086&hilit=ROI#p481668