fix a few other things

* Support int8 type.

* Add pad_constant_batch_size_like

* refine pad_op

* optimize memory

* platform module

* Update profiler.h

refine fusion lstm

* memory module

* "fix ci"

* fix auc layer and add check for auc op

* use input to check if states are inited

* optimize code

Speedup stack_op

* picked pr

* "fix ci"

* tensor windows support

* "fix ci"

* "remove utils"

* "fix ci"

* "windows tab"

* "fix ci"

* data_type

* "remove tabs"

optimize cpu vec activations

update native_infer.rst

Add sequence_mask_op for DAM model

fix bug to avoid warning once import paddle.fluid

Disable prelu_op_test until fixing Python3 issues

enhance the forward of concat op

remove broadcast in sequence_expand

Add releasing for mac

fix sparse update bug