Jensen-Su

I've tried adding `caffe.reset_all();` before `caffe.set_mode_gpu();` in `fcn_tracker.m` right as what @zawlin @myfavouritekk and @zong209 suggested. And my GPU is TITAN X with 12GB. But nothing changed, why? ```Cleared 0...

> Does (C, W) mean global position encoding? > Note that our positional encoding is relative and shared across the other axis. For example, in w-axis attention, each pixel corresponds...