* add local scope function * fix lint * fix docstring * change local_scope to local_var; add context manager * address comments
* fix gat memory increase bug * work around mxnet memory leak bug * comments * poke linter * lint * lint
* fix gat code to use latest edge softmax module * avoid transpose * update README * use edge_softmax op * mxnet edge softmax op * mxnet gat * update README * fix unittest * fix ci * fix mxnet nn test; relax criteria for prod reducer
Zihao Ye