firmware: deinterlace: fix issues with non-tunneled component
See: https://github.com/raspberrypi/firmware/issues/213

userland: raspicam: Added a signal mode to allow initiation of captures from another process
See: https://github.com/raspberrypi/userland/pull/103

userland: raspicam: Refactored raspivid to allow user to pause and restart captures
See: https://github.com/raspberrypi/userland/pull/104