* Initial checkin

Add init functions for simple bind in graph_executor

Add simple_bind c_api

Add simple bind c-api

Assign zeros to in_args, arg_grads, and aux_states

Add simple_bind2 python interface

Fix python interface bugs

Interface changes

Fix

Fix core dump

Add bind_ith_exec c_api

Change simple_bind2

Fix seg fault

Finish simple_bind

Change _bind_ith_exec

Refactor simple_bind initialization flow for bind

Consolidate bind and simple_bind graph init flow

Fix bug

Clean up

Add comments

Clean up

Clean up

Minor correction

Rename APIs in graph executor

Refactor

Rebase

Delete deprecated functions

Move more front-end work to backend

Bug fix

Fix failed tests

Minor fix

Fix lint

Fix lint

Revert unnecessary changes

Revert

Revert

Clean up

Fix lint

Fix bind_ith_exec calling simple_bind

Fix bugs for _bind_ith_exec

* Add unit test (#1)

* Add unit test

* Fix

* Small fix

* Fix lint

* Fix lint

* Fix bugs of missing ndarrays in shared_buffer

* Fix lint

* Simple bind (#3)

* Add bucketing test

* Skip pylint

* Use cpu to train

* Fix bug

* Remove merge message

* Fix lint

* Add logging to test_bucketing.py

* Reduce model size (#4)

* Add checks for shape/type inferences

* Add printing error messages for shape/type inference failure

* [Quantization] Add calibration flow

Rebase with dmlc/master

Add quantize_down_and_shrink by threshold

Don't assign resource when threshold is available for quantize_down_and_shrink

Fix quantize_down_and_shrink saturation

Implement pass for setting calib table to node attrs

Rebase with upstream master

Change threshold to min/max quantized params

Add c-api for setting calib table to graph

Add calibration front end function

Bug fixes and add unit test

Add data iter type to calibration

Fix bug in calibrate_quantized_model

Bug fix and add example

Add the second calibration approach and benchmark

Fix

Fix infer error and add benchmark for conv

Add benchmark script

* Change output names and argument names

* Remove commented out code

* Change name

* Add layout to benchmark_convolution

* Remove redundant comment

* Remove common and add soft link

* Updated tutorials page.

* Combined tutorial links

Added "alternative" links.

* Corrected typo

* Force build.

* Force build #2

* Force build #3

* Force #4