* [QUANTIZE] Quantization implementation.

* Update.

* Update.

* Update.

* Update.

[TFLite][Python 2] Solve TFLite frontend python 2 compatibility and Modify TFLite whl files path (#2529)

* nms fixed for gpu, tested on cuda and opencl devices, ssd now can run fully on the gpu

* sort updated to use virtual thread

* typo fixed

* fix lint

* fix lint

* add support when batch_size > 1

* intel graphics conv2d bugs fixed for inception_v3

* intel conv2d api updated, nn input size 4 condition added

* review addressed

* move conv_tags to attributes

* opencl ctx fixed

* nms_ir index simplified

* [Relay][Frontend] Add CoreML Support

* pip install six in CI

* remove triggering nnvm coreml test

* set opt_level=2 for nnvm coreml test case

* TFLite frontend tutorial

* Modify as suggestion

Signed-off-by: Zhebin Jin <zhebin.jzb@alibaba-inc.com>

* [AUTOTVM] typo

* trigger CI

* [RELAY] Fix ops in packed layout

* Fix style

* Update deploy_model_on_rasp.py

spelling fix.

* Update deploy_model_on_rasp.py

trigger CI

* Support TFLite FP32 Relay frontend.

* Fix lint issue

* Remove unnecessary variables and packages

* Add method doc string

* Fix capital letter of method doc string

* Add TFLite FP32 Relay frontend based on latest code

* Merge the latest code

* Solve cython issue with relay type inference

* Modify code based on suggestions

* use IPV6 instead of IPV4

* backward compatible

* add error report

* fix linter

* more linter

* fix the python2 api

* Avoid runtime exception when file doesn't exist

* Update the check based on feedback

* Revert the old fix