* Update source files.

* Update headers

* Update

* Update

* Update

* Update

* Fix a CMake dependency

* Make CUPTI_LIB_PATH not passing by macro.
* Add missing header

* "unified operators"

* "add CUDNN register"

* "add use cudnn attribute"

* "add attribute"

* "test conv tranpose op"

* "remove duplicated attr"

* "fix op test"

* "add attribute to set cudnn"

* "add more log"

* "need layout op register support"

* "add more log"

* "change GetExpectedKernelType "

* "fix Get attr in conv_op"

* "fix CI"

* "fix tests"

* "removed kernel priority fallback"

* "fix CI"

* "fix stack pointer bug"

* "refine buggy interface"

* "add const cast to save life"

* "fix get_output_with_grad"

* "fix op test with dataformat"

* ""fix pooling

* "fix pooling test"

* "fix CI"

* "fix with_gpu error"

* "add transform needed functional check"

* "fix unpack list error"

* "comment out parallel.do temporary"

* "fix CI"

* "fix compile doc error"

* "make threshold larger"

* Add HasCUDNN to detect if CUDNN is installed or not

* Fix CI

* "add nccl enforce"

* Dev

* Update comment

* Add nccl test

* Follow comments

This only fixes the issue for ATLAS
MKL is still another fix.

* some tiny fixs

* use VLOG(3)

* DYLD_LIBRARY_PATH is disable after Mac OS X 10.11
* fix clang + gpu compile error on Mac OS
* fix some words and errors in build docs