test=develop

- Added new header for MKLDNN reuse functionality

- Extended conv2d_transpose GetExpectedKernelType for MKL-DNN supporrt

- Buildable conv transpose mkldnn and conv mkldnn using conv template

- Conv2d transpose roughlt implemented and buildable

- Added modifications conv2d transpose MKLDNN unit tests

- Fix to UT of conv2d transpose mkldnn op

- Wrong type of MKLDNN primitive was chosen for conv2d transpose

- HAcks for conv2d transpose

- UT enalbed

- Replaced copying loop with memcpy

- Draft of passing lambda into AcquireMemory

- Made reorder (IOHW->OIHW) to be called only once

Windows/online

Upgrade pybind11 to v2.2.4 to support Python3.7

test=develop

test=develop

* Transpose-Flatten-Concat fusion operator.
* Add unit testing and fix bug.

fix compile

test=develop

fix Mac unittest error on reading pined memory flag

*  fix mkdir conflict

*  fix load/save lookup tables

 test=develop

* add lookup_table_utils

* fix load optimize vars on pserver

* delete lookup table utils

* fix save and load lookup tables

* fix load optimizer var

* fix load optimizer var, test=develop

* fix python 3 style, test=develop

* move lookup_table_utils to contrib utils

refine prelu api doc

* Remove the memory copy for feeding data in C++ inference API
* Fix compling dependence
* Fix compling in ONLY_CPU mode

test=develop

Fix increment_op doc

test=develop

test=develop

Merge branch 'fix_mac/fix_pinned_memory' of https://github.com/JiabinYang/Paddle into fix_mac/fix_pinned_memory

* test=develop

remove code.

* test=develop

Fix cublas warp error

test=develop

test=develop

test=develop

Add python3.6 python3.7 support in ubuntu dockerfile

test=develop