From: @Margaret_wangrui
Reviewed-by: @hwhewei,@zh_qh
Signed-off-by: @zh_qh

From: @zhujingxuan
Reviewed-by: 
Signed-off-by:

From: @hwhewei
Reviewed-by: @zh_qh,@ginfung
Signed-off-by: @zh_qh

From: @lianliguang
Reviewed-by: 
Signed-off-by:

From: @zoloft
Reviewed-by: @wangchengyuan,@hangangqiang
Signed-off-by: @wangchengyuan

From: @wangchengyuan
Reviewed-by: @hangangqiang
Signed-off-by:

Use OrderedSet for order list to optimize performance.

From: @zengzitao
Reviewed-by: 
Signed-off-by:

From: @gongdaguo
Reviewed-by: 
Signed-off-by:

From: @dessyang
Reviewed-by: @robingrosman,@c_34
Signed-off-by: @c_34

Removed run_eval_gpu.sh

update ReadMe

fix bug in train.py

fix bug of eval

fix accuracy issue in the new ascend

add teacher_force

add self-defined LSTM

From: @changzherui
Reviewed-by: 
Signed-off-by:

From: @zlq2020
Reviewed-by: @guoqi1024
Signed-off-by: @guoqi1024

From: @cjh9368
Reviewed-by: @zhanghaibo5,@hangangqiang
Signed-off-by: @zhanghaibo5

From: @zhanyuan1
Reviewed-by: @zhanghaibo5,@zhang_xue_tong
Signed-off-by: @zhang_xue_tong

From: @oacjiewen
Reviewed-by: @liangchenghui,@c_34
Signed-off-by: @liangchenghui

From: @zhaozhenlong
Reviewed-by: 
Signed-off-by:

From: @ms_yan
Reviewed-by: 
Signed-off-by:

Add API class for text transforms ops

From: @peilin-wang
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

change to test in graph mode

From: @peilin-wang
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

From: @TFbunny
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

From: @peilin-wang
Reviewed-by: @robingrosman,@tom__chen
Signed-off-by: @robingrosman

From: @c_34
Reviewed-by: @oacjiewen,@liangchenghui
Signed-off-by: @liangchenghui

From: @david-he91
Reviewed-by: 
Signed-off-by:

From: @joylvliang
Reviewed-by: 
Signed-off-by:

From: @ginfung
Reviewed-by: 
Signed-off-by:

From: @chenfei52
Reviewed-by: @ginfung,@zh_qh
Signed-off-by: @zh_qh

From: @wang_shaocong
Reviewed-by: @zhang_xue_tong,@zhanghaibo5
Signed-off-by: @zhanghaibo5