Proto commits in email2liyang/grpc-mate

These 14 commits are when the Protocol Buffers files have changed:

Commit:e080aa7
Author:Ivan Li

add restful support

The documentation is generated from this commit.

Commit:8d9ceaa
Author:Ivan Li

move java code to it's own folder

Commit:2662f0a
Author:ivan

add hello world service to demo google cloud endpoint

Commit:0354948
Author:Ivan Li

impl downloadProductImage

Commit:1ad4101
Author:Ivan Li

define message DownloadProductImage

Commit:68bc0b0
Author:Ivan Li

impl echo service

Commit:066ec03
Author:Ivan Li

add echo service

Commit:a05472f
Author:Ivan Li

define go package

Commit:4aec206
Author:Ivan Li

add rest end point for direct grpc call

Commit:468d3a5
Author:Ivan Li

add google api for restful endpoint

Commit:2d3596c
Author:Ivan Li

impl Product Dao and test

Commit:2b62ad5
Author:Ivan Li

complete proto buffer definition for the demo script

Commit:6dd3c69
Author:Ivan Li

complete proto buffer definition for the demo script

Commit:f961640
Author:Ivan Li

add protobuffer file