GitLab

* new hetero RGCN

* bgs running

* fix gpu

* am dataset

* fix bug in label preparation

* Fix AM training; add result

* rm sym link

* new embed layer; mutag

* mutag matched; other fix

* minor fix

* dataset refactor

* new data loading

* rm old files

* refactor

* docstring

* include literal nodes in AIFB dataset

* address comments

* docstring