* Add sub_blocks of lr_decay_op to pserver_prog after distribute_transpiler

* Remove unused logs and logics

* 1. Add ops to new block (considering the nested block condition)
2. Follow the original hierarchy of blocks
3. Change the function's name and remove debug lines

refine the initial cpu memory flag for mkldnn

concat support data as input

add doc for inference_transpiler

MKLDNN layout: Support for activation operator

* Remove tape

* remove tape in cmake

* fix CI

update split_lod_tensor, create_array and array_length doc

Fix api reference docs

Hide StaticRNNMemory

 Fix doc of warpctc, array_read, edit_distance and sequence_reshape.

[API Reference] fix some typo in layers

Fix doc of relu, log and zeros.

Add API reference

Fix conv3d/conv3d_trans/slice/mean_iou Doc

* Modify lod_tensor.md and nn.py

* Modify control_flow.py doc

* undo change in lod_tensor.md

remove mkldnn flag from gtest strdup for cpu

* add lod_tensor util and modify pybind

* refind pybind LoDTensor API and modify LoDTensor and DataFeeder test

* fix test error

* fix detection map op test

* fix reorder_lod_tensor test

* fix seq_concat_op

* fix chunk evel op test

* fix target assign op

* fix warp ctc op

* address comments step 1: reverse reset_lod op

* step 2: modify op test

* add warning message

* remove has_valid_lod

* add back has_valid_lod

* address comments

* add exception catching trial