* [PASS] include knullop info in plan memory

* Bugfix plan memory, fully support mxnet

* [INFER] Enhance backward op policy

* [SYMBOL] add list inputs

* relax graph attr to enable copy-on-write

* Remove warning in g++5

* Change function def to Node ref for more flexiblity

* updates (#1)

* add scalars

* change format

* change inferattr interface

* remove scalar

* remove warning

* [FIX] Remove extra move

* [MEMORY] Add inplace index

* Update tuple to be compatible with mshadow

* Move set error message to C API

* simplify with using

* updates to shape inference

* Add unnamed namespace to the implementations

* [SYMBOL] Enable inference of Auxiliary data, rename list_arguments to list_inputs

* Remove outstanding cython functions

* Add in operator overload

* Enable JSON to save version

* [PASS] Add order mutation

* A few benchmarks on compose speed

* [PYTHON] Check in a symbolic construction interface in python, start add graph API

* Graph API

* [SYMBOLIC] Add symbolic API

* Update Testcase to nnvm