* "fix data transform"

* "data transformer"

* "add device pool"

* "add test"

* "fix ci"

* "fix datalayout implementation "

* "fix based on comment"

add Detection output op for SSD

Add backward doc and comments

Feature/rnn gradient check

Refine the activation type in the GRU operator related

Refine cos-sim-op

Adam selectedrows and scatter functors

update alexnet inference benchmark data on MKL

fix inference crash of alexnet benchmark

add paddle version of pip install and docker

* add helper function to get appropriate DeviceContext

GemmConvMobileFunction(optimized for mobile)

auto set openblas env

Feature/check nan executor