New directions

I think I've mined everything useful in recognition from hair, hair matting, matting generally, and the cogsci angle on why external features are potentially useful. I hope to look more at ears, jawline, head shape, eyebrows, and automatic shaving. The last is because hair (head, eyebrows, face) as a biometric can be spoofed, and being able to identify and eliminate hair could make recognitions systems robust to that spoofing.