add 'is this really a viable approach for tensorflow?' to faq
add 'is this really a viable approach for tensorflow?' to faq

hughperkins/coriander,hughperkins/cuda-on-cl,hughperkins/cuda-on-cl,hughperkins/coriander,hughperkins/cuda-on-cl,hughperkins/coriander,hughperkins/coriander,hughperkins/cuda-on-cl