add README_en.md

onnx2fluid/README_en.md

+# onnx2fluid
+
+[![License](https://img.shields.io/badge/license-Apache%202-blue.svg)](LICENSE)
+
+onnx2fluid support converting ONNX model to PaddlePaddle Model for prediction. 
+
+## Running Environment
+
+* python3.5+ (python2 working in progress)
+* onnx == 1.4.0
+* paddlepaddle == 1.3.0
+
+## Get started
+
+Test with pretrained models from ONNX repositories:
+
+``` shell
+python setup.py install
+cd examples
+sh onnx_model_zoo.sh
+```
+
+Try exporting from PyTorch to Paddle fluid:
+
+``` shell
+python setup.py install
+cd examples
+python gen_some_samples.py
+onnx2fluid sample_1.onnx -t sample_1.npz
+```
+
+## Usage
+
+```shell
+onnx2fluid [-dexy] -o /path/to/export_dir/ /path/of/onnx/model.onnx
+
+optional arguments:
+  --embed_params, -e    try to embed parameters for trainable Paddle fluid layers
+  --no-pedantic, -x     process non-standard ONNX ops
+  --skip-version-conversion, -y
+                        skip ONNX op version conversion, workaround for
+                        RumtimeErrors
+  --archive [ARCHIVE], -z [ARCHIVE]
+                        compress outputs to ZIP file if conversion successed
+```