Add attention lstm cpu forward

Add stack_op for DAM model

enhance test_analyzer to profile ditu inference demo

bug fix

* add is_test for while_op

* Change API

Add scope info in graphviz debug

* dist transpiler add control dependency var between send and recv

* fix async deps

* follow comments and refine

* fix deps connect for rpc ops

refine Node

* Add Python Callstacks when Op::Run error

* Skip op with sub-block

* refactor: refine callstack info's format

* Reshape only support matrix

* Polish Python code

* Fix UT

* Fix Py3

Feature/process lod grad

* Disable in_place in batch_norm API.

* anakin support x86

* fix code style

* add anakin ditu cnn demo

* add timer

* add rnn

* fix inference_anakin_cnn/rnn_test compile error

* make anakin_rnn_tester run

* add anakin_enable_op_time option

* update api/CMakeLists.txt

* enlarge the max_batch_size in anakin.config

* update with comments