Proto commits in thuml/Xlearn

These 4 commits are when the Protocol Buffers files have changed:

Commit:a9e8e58
Author:Lustralisk

fix JAN on alxenet

The documentation is generated from this commit.

Commit:62d45f0
Author:caozhangjie

fix bug

Commit:74c1276
Author:朱晗

code and proto polish

Commit:2bf8d60
Author:caozhangjie

xlearn caffe initialize