Fix docker build using cdn url

* Fix bug in generate_proposals_op.
* Fix data type for RoIs.
* Refine and fix rpn_target_assign_op.
* Add the missing file bbox_util.h
* Rename BoxEncoder to BoxToDelta

refine fusion lstm and gru op test

Revert "Add CudnnHolder and use it in Conv and ConvTranspose op"

fix deadlinks in readme

bug fix

Feat: add sequence enumerate op

Fix grpc download url bug.

Optimize fusion lstm batch mode

* framework cmake

* Update CMakeLists.txt

remove recordio doc

Add CudnnHolder and use it in Conv and ConvTranspose op

Optimize fusion gru

cuda windows

* fix high level API(Inference) bug

* patch the unit tests

modify the timer

Fix bug of sampling_id op

* Improve and fix fake_quantize_op.

* windows inference fix

* windows inference fix