GitLab

* fix rgcn tutorial

* small fix

* upd

* update version; add news.md; modify contributing.md

* change urls to dmlc

* improve capsule tutorial with jinyang

* fix wrong layout of second-level tutorial

* delete transformer

* fix dgmg tutorial indentation

* bug in incidence_matrix docstring

* remove print

* 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