* Inception fusion operator.
* Support horizontal layer fusion in conv_fusion_op.
* Search conv algo strategy for variable-length input.
   search N times and cache the searched algos. For other input, choose the algo of input whose area is closest to this input.

Disable data balance unittest

adaptive_pool support pool_size as int. test=develop

en api improve format Dec 27

add cuda dso support for windows

Add debug thread function for async executor

Accelerate little models

test=develop

Upgrade ngraph & clean up cmake

Rewrite ddim

* wip

* wip

* refactor no.1 dir structure test=develop

* fix linking test=develop

* fix includes test=develop

* fix build test=develop

* fix build test=develop

Try to fix test_py_reader_use_executor.py

refactor to avoid scope.

test=develop

* refine batch merge pass

* refine batch merge pass test=develop

test=develop

test=develop

test=develop

Add conv+ affine channel fuse pass 

test=develop

* Refine Dockerfile

* Add tasks, cmake gen

* Fix code error

* Disable compile after paddle_build.sh

* Refine

* Skip on PY35 CI

* Change env

* Refine paddle_build.sh

* Expose gen_fluid_lib

* Refine mkldnn.cmake

* Refine mkldnn.cmake

* Refine mkldnnlib

* Skip unstable tests

test=develop

Rewrite variable type

* refine parallel_exe
test=develop

* rename shared_var_device

* code refine

* add test_weight_decay

* remove Sort
test=develop

* Add SortForReduce
test=develop

* code refine
test=develop

* follow comment
test=develop

test=develop

test=develop

test=develop

simplify analysis tests

fix test issues on windows

test=develop

test=develop

test=develop

test=develop

test=develop