Dygraph fix2 (PaddlePaddle#455)

* remove redundent dep

* + github stale.yml

* update seq2seq

* remove paddle from `requirements.txt`; add paddle version check

* rename zh/en readme

.github/stale.yml

@@ -0,0 +1,18 @@
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 60
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - pinned
+  - security
+# Label to use when marking an issue as stale
+staleLabel: wontfix
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs. Feel free to reopen it.
+  Thank you for your contributions.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: false
+

README.eng.md → README.en.md

@@ -1,4 +1,4 @@
-English|[简体中文](./README.md)
+English|[简体中文](./README.zh.md)
 
 ![./.metas/ERNIE_milestone.png](./.metas/ERNIE_milestone.png)
 
@@ -76,18 +76,22 @@ Don't have GPU? try ERNIE in [AIStudio](https://aistudio.baidu.com/aistudio/inde
 
 # Setup
 
-##### 1. install ernie
+##### 1. install PaddlePaddle
+
+This repo requires PaddlePaddle 1.7.0+, please see [here](https://www.paddlepaddle.org.cn/install/quick) for installaton instruction.
+
+##### 2. install ernie
 
 ```script
-pip install paddle-ernie==0.0.1.dev1
+pip install paddle-ernie
 ```
 
 or 
 
 ```shell
 git clone -b dygraph https://github.com/PaddlePaddle/ERNIE.git --single-branch
 cd ERNIE
-pip install -r requirement.txt
+pip install -r requirements.txt
 pip setup.py -e .
 
 ```

README.md

@@ -0,0 +1 @@
+README.zh.md