* add export_model and deploy

* fix travis-ci

* update CMakeList & linux doc

* update by comments

* deploy/cpp : Update cpp ineference solution

* add README.md to deploy

* deploy/cpp : add PadStride

* deploy/cpp : add output visualization

* deploy/cpp: add video support

* fix coding style problem

* deploy/cpp : add README.md

* deploy/cpp : update docs

* deploy/cpp : update linux build scripts

* deploy/cpp : update linux build docs

* udpate docs

* deploy/cpp : update windows build docs

* depoy/cpp: fix coding style

* fix coding style

* Create CMakeSettings.json

* Update README.md

* Update windows_vs2019_build.md

* Update CMakeLists.txt

* Update linux_build.md

* Update CMakeLists.txt

* deploy/cpp : update linux build script

* update doc structures and support arch Face

* fix all documentation

* fix docs conf.py

* fix some error

* fix readthedocs

2. change code style
3. add error messages: display detail about input errors and config file errors

* update code & doc

* Add C++ inference solution.
* Correct the link.