* rgcn tutorial
* data processing for rgcn
* many fix
* requirements for rgcn tutorial
* fix comments
* description of rgcn dataset
* author
* bug fix
* move all dataset to s3
* new capsule tutorial
* capsule for new API
* fix deprecated API
* New tutorial and example
* investigate gc problem
* add viz code
* new capsule tutorial
* remove ipynb
* move u_hat
* add link
* add requirements.txt
* remove ani.save
* update ci to install requirements
* add graphviz