GitLab

* Add hgat example

* Add experiment

* Clean code

* clear the code

* Add index in README

* Add index in README

* Add index in README

* Add index in README

* Add index in README

* Add index in README

* Change the code title and folder name

* Ready to merge

* Prepare for rebase and change message passing function

* use git ignore to handle empty file

* change file permission to resolve empty file

* Change permission

* change file mode

* Finish Coding

* working code cpu

* pyg compare

* Accelerate with batching

* FastMode Enabled

* update readme

* Update README.md

* refractor code

* add graphsim code

* modified code

* few fix

* Modified graphsim

* Simple Model Added

* Clean up code

* Refractor the code for Merge

* Bugfix enable gradient when train

* update readme and format
Co-authored-by: Chen <chesirui@3c22fbe5458c.ant.amazon.com>
Co-authored-by: Tianjun Xiao <xiaotj1990327@gmail.com>
Co-authored-by: Ubuntu <ubuntu@ip-172-31-4-63.ap-northeast-1.compute.internal>
Co-authored-by: Ubuntu <ubuntu@ip-172-31-45-47.ap-northeast-1.compute.internal>