GitLab

* Add HeteroGraphConv

* add custom aggregator; some docstring

* debugging

* rm print

* fix some acc bugs

* fix initialization problem in weight basis

* passed tests

* lint

* fix graphconv flag; add error message

* add mxnet heteroconv

* more fix for mx

* lint

* fix torch cuda test

* fix mx test_nn

* add exhaust test for graphconv

* add tf heteroconv

* fix comment