GitLab

* Edit for readability

* giant_graph_readme edit for grammar

* NodeFlow and Sampling edit pass for grammar

* Update tutorials/models/1_gnn/9_gat.py

* Update tutorials/models/1_gnn/9_gat.py

* enable tutorial test in CI.

* reduce overhead.

* fix doc

* fix some format and warnings

* fix

* doc page for builtin functions; install from source doc

* upload rst

* update

* minor fix

* Update 2_giant.py

* fix.

* fix.

* tutorial.

* update images.

* add index.

* update.

* update tutorial.

* add sampling tutorial.

* add readme

* update author list.

* fix indent in the code.

* rename the file.

* update tutorial.

* fix the last API.

* update image.