Create CONTRIBUTING.md (#558)
Create CONTRIBUTING.md (#558)
mesosphere/dcos-cli,sis-tools/dcos-cli,kensipe/dcos-cli,dcos/dcos-cli,kensipe/dcos-cli,dcos/dcos-cli,sis-tools/dcos-cli,dcos/dcos-cli,dcos/dcos-cli,mesosphere/dcos-cli,sis-tools/dcos-cli,dcos/dcos-cli,kensipe/dcos-cli,kensipe/dcos-cli,kensipe/dcos-cli,mesosphere/dcos-cli