[DOC] Fix docs links of readme (#1713)

* [DOC] Fix docs links

- 修复文档连接
- 补齐英文文档关于测试数据生成的说明

README.md

@@ -83,7 +83,7 @@ At present Paddle-Mobile only supports Paddle fluid training model. Models wiil
 ### 1. Use Paddle Fluid directly to train
 It is the most reliable method to be recommanded
 ### 2. Transform Caffe to Paddle Fluid model
-[https://github.com/PaddlePaddle/models/tree/develop/fluid/image_classification/caffe2fluid](https://github.com/PaddlePaddle/models/tree/develop/fluid/image_classification/caffe2fluid)
+[caffe2fluid](https://github.com/PaddlePaddle/models/tree/develop/PaddleCV/caffe2fluid)
 ### 3. ONNX
 ONNX is expanded as Open Neural Network Exchange. The project is aimed to make a full communication and usage among diffrent nerual network development frameworks.
 
@@ -93,7 +93,7 @@ At present，work in support of onnx is also under operation in Baidu. Related t
 [https://github.com/PaddlePaddle/paddle-onnx](https://github.com/PaddlePaddle/paddle-onnx)
 
 ### 4. Download parts of testing models and testing pictures
-[http://mms-graph.bj.bcebos.com/paddle-mobile%2FmodelsAndImages.zip](http://mms-graph.bj.bcebos.com/paddle-mobile%2FmodelsAndImages.zip)  
+[http://mms-graph.bj.bcebos.com/paddle-mobile%2FmodelsAndImages.zip](http://mms-graph.bj.bcebos.com/paddle-mobile%2FmodelsAndImages.zip)
 
 - input data generated by tools from `tools/python/imagetools`.
 
@@ -103,7 +103,7 @@ At present，work in support of onnx is also under operation in Baidu. Related t
 ### 1. 直接使用Paddle Fluid训练
 该方式最为可靠，推荐方式
 ### 2. caffe转为Paddle Fluid模型
-[https://github.com/PaddlePaddle/models/tree/develop/fluid/image_classification/caffe2fluid](https://github.com/PaddlePaddle/models/tree/develop/fluid/image_classification/caffe2fluid)
+[caffe2fluid](https://github.com/PaddlePaddle/models/tree/develop/PaddleCV/caffe2fluid)
 ### 3. ONNX
 ONNX全称为“Open Neural Network Exchange”，即“开放的神经网络切换”。该项目的目的是让不同的神经网络开发框架做到互通互用。
 
@@ -115,6 +115,8 @@ ONNX全称为“Open Neural Network Exchange”，即“开放的神经网络切
 ### 4. 部分测试模型和测试图片下载
 [http://mms-graph.bj.bcebos.com/paddle-mobile%2FmodelsAndImages.zip](http://mms-graph.bj.bcebos.com/paddle-mobile%2FmodelsAndImages.zip)
 
+- 测试输入数据可由本仓库下的脚本`tools/python/imagetools`生成。
+
 ## Communication
 - [Github Issues](https://github.com/PaddlePaddle/Paddle/issues): bug reports, feature requests, install issues, usage issues, etc.
 - QQ discussion group: 696965088 (Paddle-Mobile).