* Handling duplicate NodeEntries on the edge of the graph

* Fix docs and segfault

* Suggestions from review

* Added attr_parser check

* Change TShape::index_t to int64_t

* Add comment

* Make Tuple::Save&Load dtype generic

* trigger update

* Fix lint

* Fix comment

* Change index_t to dim_t

* Remove legacy index_t

* CMake/make adjustments and warning fix

* Fix warnings

* change to match by both op and name

* add zero prop for non differentiable ops

* Update infer_shape_type.cc

* enable shape hints during infer_shape pass

* fix comment

* Imbalance version of shared pool during plan memory

* Bug fix for no shared_pool case

* Auto search and updated shared mem pool

* Cleanup unused code

* Cleanup logging code

* Add unit test for shared storage

* Remove shared pool in PlanMemory. Fix lint warnings

* Fix lint warnings

* Use reference instead of ptrs

misstype fix

* Remove dmlc headers, add optional DMLC_CORE_PATH variable for build path

* travis.yml doesn't need to clone dmlc-core anymore

* add FSetInputVariableAttrs

* rename

* Fix warnings from Logging, enable Plan memory to take external memory

* fix external memory id

* fix graph

* add amalgamation

* update target name

* fix error message

* fix

* Add list attr recursive

* fix

* fix glog

* sync logging improvement from dmlc

* Remove backward index, use gradient guessing instead

* minor fix

* bugfix

* Enable optional dependency memory and attr hint

* fix travis