Merge the latest commit of develop#26

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Shixiaowei02 merged 69 commits intoShixiaowei02:developfrom

PaddlePaddle:develop

May 9, 2019

Commits on Apr 29, 2019

Commits on Apr 30, 2019

Commits on May 1, 2019

remove async executor python api to fix document (#17174)
guru4elephant
authored

Commits on May 6, 2019

Commits on May 7, 2019

Commits on May 8, 2019

Fix some data and reader related API code (#17202)
zhhsplendid
authored
Code Clean: Move all pass to paddle::framework::ir (#17228)
chengduo
authored
Fix code in document. (#17237)
gongweibao
authored
document_preview (#17166)

tianshuo78520a
authored and
luotao1
committed
Polish Executor and Compiler doc (#17262)
chengduo
authored
add scale pass for calculating the output scales.test=develop (#17259)
wzzju
authored
improved unit test output (#17266)

Wojciech Uss
authored and
luotao1
committed
Adding lrn op for ngraph engine (#17189)

baojun-nervana
authored and
tensor-tang
committed
Fix bp of roi perspective transform op. (#17216)

wanghaoshuang
authored and
qingqing01
committed
Fix api example (#17231)
ceci3
authored
Fix the KL algorithm bug when calculated the size of tensor. (#17198)

guomingz
authored and
luotao1
committed
Fix concat shape check (#17247)
phlrain
authored
update assert (#17282)
chengduo
authored
Optimize the cuda implementation of sum_op (#17283)
Xreki
authored
Repair api example (#17221)
junjun315
authored
test=develop, fix error with training and test on diff device (#17276)
JiabinYang
authored
Refine elementwise kernel. (#16952)
zhaoyuchen2018
authored
modified formula for Lrn (#17281)

tink2123
authored and
shanyi15
committed
Fix API example code of save_inference_model (#17274)
zhhsplendid
authored
use sync copy (#17291)
chengduo
authored

Commits on May 9, 2019