Install mpi-operator

[lwilson]

Install mpi-operator

[j0hnL]

we should include a working example along with this installation. Running a simple tensorflow w/ horovod or mpi 'hello world' would be fitting

[lwilson]

We currently have an MPIJob example which uses apiVersion kubeflow.org/v1alpha1 and runs the Tensorflow Benchmark: https://github.com/dellhpc/omnia/blob/devel/examples/k8s-TensorFlow-resnet50-multinode-MPIOperator.yaml.

Should we add another example that uses apiVersion kubeflow.org/v1alpha2 (e.g., https://github.com/kubeflow/mpi-operator/blob/v0.2.2/examples/v1alpha2/tensorflow-benchmarks.yaml)?

[j0hnL]

Remove the old v1alpha1 example and move forward with master branch of mpi-operator

[lwilson]

@j0hnL should we rely on master or stick with a tagged release?

[lwilson]

I changed this to use master instead of v0.2.2. See #48 (comment)