Merge branch 'jiawei/doc_en' of https://github.com/wangjiawei04/Serving into jiawei/doc_en

doc/ABTEST_IN_PADDLE_SERVING.md

 # ABTEST in Paddle Serving
 
+([简体中文](./ABTEST_IN_PADDLE_SERVING_CN.md)|English)
+
 This document will use an example of text classification task based on IMDB dataset to show how to build a A/B Test framework using Paddle Serving. The structure relationship between the client and servers in the example is shown in the figure below.
 
 <img src="abtest.png" style="zoom:33%;" />

doc/ABTEST_IN_PADDLE_SERVING_CN.md

 # 如何使用Paddle Serving做ABTEST
 
+(简体中文|[English](./ABTEST_IN_PADDLE_SERVING.md))
+
 该文档将会用一个基于IMDB数据集的文本分类任务的例子，介绍如何使用Paddle Serving搭建A/B Test框架，例中的Client端、Server端结构如下图所示。
 
 <img src="abtest.png" style="zoom:33%;" />

doc/DESIGN_DOC.md

 # Paddle Serving Design Doc
 
+([简体中文](./DESIGN_DOC_CN.md)|English)
+
 ## 1. Design Objectives
 
 - Long Term Vision: Online deployment of deep learning models will be a user-facing application in the future. Any AI developer will face the problem of deploying an online service for his or her trained model.

doc/DESIGN_DOC_CN.md

 # Paddle Serving设计文档
 
+(简体中文|[English](./DESIGN_DOC.md))
+
 ## 1. 整体设计目标
 
 - 长期使命：Paddle Serving是一个PaddlePaddle开源的在线服务框架，长期目标就是围绕着人工智能落地的最后一公里提供越来越专业、可靠、易用的服务。

doc/README.md

@@ -109,7 +109,7 @@ for data in test_reader():
 
 [Design Doc](DESIGN.md)
 
-[FAQ](FAQ.md)
+[FAQ](./deprecated/FAQ.md)
 
 ### Senior Developer Guildlines
 

doc/README_CN.md

@@ -109,7 +109,7 @@ for data in test_reader():
 
 [设计文档](DESIGN_CN.md)
 
-[FAQ](FAQ.md)
+[FAQ](./deprecated/FAQ.md)
 
 ### 资深开发者使用指南
 

doc/RUN_IN_DOCKER.md

 # How to run PaddleServing in Docker
 
+([简体中文](./RUN_IN_DOCKER_CN.md)|English)
+
 ## Requirements
 
 Docker (GPU version requires nvidia-docker to be installed on the GPU machine)

doc/RUN_IN_DOCKER_CN.md

 # 如何在Docker中运行PaddleServing
 
+(简体中文|[English](RUN_IN_DOCKER.md))
+
 ## 环境要求
 
 Docker（GPU版本需要在GPU机器上安装nvidia-docker）