Proto commits in Terry-Mao/bfs

These 3 commits are when the Protocol Buffers files have changed:

Commit:646998e
Author:guhao

upgrade

The documentation is generated from this commit.

Commit:36965ae
Author:zhapuyu

fix cache

This commit does not contain any .proto files.

Commit:2bf8869
Author:zhapuyu

add cache and fix some bug