Add Travis config

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Merge pull request #8 from bfirsh/travis

Add Travis config
Add script to validate DCO

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Merge pull request #9 from bfirsh/validate-dco

Add script to validate DCO
Explain setting up Docker to run against machines

Closes #14

Signed-off-by: Ben Firshman <ben@firshman.co.uk>
Merge pull request #15 from bfirsh/update-message-when-machines-are-created

Explain setting up Docker to run against machines