Editing localization loss

[HSinger04]

1. Calculate A (Is the style matrix. See Fig. 2 in Editing in Style.)
2. Get Segmentation (tf.resize)
3. Normalize A
4. (Downsample Segmentation)
5. Follow Eq. 3 from VOGUE (Just multiply A^2 with U and then use reduce_mean)
6. Unclear: Right side of page 4