Multiple formatters

[jbpros]

Allow for multiple formatters in a single run. This is already easy to accomplish in non-CLI environments.

[jbpros]

Now programatically achievable through registerListener() thanks to 4be20a5.

Next step: make this available through the CLI.

[jbpros]

See #215.

[cades]

+1

[charlierudolph]

My suggestion for the CLI from #389

# equivalent
--format pretty 
--format pretty:stdout

--format json:/path/to/output

[kmckee]

I'd love to see this feature.

I'm running cucumberjs on a ci server. I want pretty output sent to stdout and junit output to a file so that Jenkins can parse it.

[bricas]

+1

[yaworsw]

+1

[mohlsen]

+1