Should we have integration tests that use separate executables?

[hyperthunk]

This is quite awkward to set up in travis, though on my local machine using a docker image it seems to work fine. Might be an additional use case for the next major version.

[akilegaspi]

I'm a new user of distributed-process but I agree, should have at least different executables for tests such that it will also serve as a demo for new users for proof-of-concept but if maintaining it would be a drag/liability then it would be better to just create documentation for them.