Merge pull request #1 from PaddlePaddle/develop

update-2020-7-17

doc/doc_en/update_en.md

+# RECENT UPDATES
+
+- 2020.6.5 Support exporting `attention` model to `inference_model`
+- 2020.6.5 Support separate prediction and recognition, output result score
+- 2020.5.30 Provide Lightweight Chinese OCR online experience
+- 2020.5.30 Model prediction and training support on Windows system
+- 2020.5.30 Open source general Chinese OCR model
+- 2020.5.14 Release [PaddleOCR Open Class](https://www.bilibili.com/video/BV1nf4y1U7RX?p=4)
+- 2020.5.14 Release [PaddleOCR Practice Notebook](https://aistudio.baidu.com/aistudio/projectdetail/467229)
+- 2020.5.14 Open source 8.6M lightweight Chinese OCR model