Update ADOPTERS.md (kubeflow#258)

Update README to use the new single deploy config (kubeflow#143)

update dockerfile and examples to v1alpha2 (kubeflow#130)

MXNet distributed training (kubeflow#122)

* MXNet distributed training

* change apiVersion

* Addressed some review comments

Newline related comments

* Revert "change apiVersion"

This reverts commit 163aed7.

add terrytangyuan as reviewer; remove inactive reviewers (kubeflow#76)