Merge remote-tracking branch 'origin/general-server-imagenet' into general-server-imagenet

python/examples/imagenet/README.md

+## 图像分类示例
+
+示例中采用ResNet50_vd模型执行imagenet 1000分类任务。
+
+### 模型及配置文件获取
+```
+wget https://paddle-serving.bj.bcebos.com/imagenet-example/conf_and_model.tar.gz
+tar -xzvf conf_and_model.tar.gz
+```
+### 执行预测服务
+
+启动server端
+```
+python image_classification_service.py conf_and_model/serving_server_model workdir
+```
+
+client端进行预测
+```
+python image_http_client.py
+```
+
+*server端示例中服务端口为9393端口，client端示例中数据来自./data文件夹，server端地址为本地9393端口，可根据实际情况更改脚本。*