GitLab

* New version for the convolutional layer

* Minor changes

* Minor changes

* Update python/dgl/nn/pytorch/conv/chebconv.py
Co-authored-by: Zihao Ye <zihaoye.cs@gmail.com>

* Resolved variable miss-naming, import simplifying and raising warning

* Added dg_warnings instead of warnings.warn

* add doc

* upd

* upd
Co-authored-by: Zihao Ye <zihaoye.cs@gmail.com>
Co-authored-by: yzh119 <expye@outlook.com>