IO selection configuration for master
- allow pipe setup
- allow ssh setup

YML configuration

---
hydra:
  workers:
  - type: local
    runners: 4
  - type: ssh
    connect: localhost
    directory: /path/to/suite
    [command: rake hydra:worker RUNNERS=1]
    runners: 4

v0.6.0

multitest backwards compatible

v0.7.0

???

v1.0.0