2. replace split_method with slice_var_up in func init_splited_variables

2. Merge the develop repo

make infer test more stable.

* WIP move weight decay

* weight decay ok

* wip

* clean up transpiler

* add details folder

* update

* fix split var test

* follow comments

Fluid guide img

2. remvoe comment line

Withdraw MKLDNN Mul operator

Fix compile error on mac caused by std move

fix compiler error when do not have TensorRT library

Simplify and make clear function names on Machine Translation example

* initial commit

* modify rnn_encoder_docoder example

2. add align_var_to_block argument to func transpile
3. remove concat and spilt if align_var_to_block is False
4. unittests for simple_dist_transpiler

Fix contribution doc

better profiler and benchmark

fix two bugs

Add random crop op

Merge branch 'dev_add_random_crop_op' of https://github.com/JiayiFeng/Paddle into dev_add_random_crop_op