Simplify the job process

Currently there are just too many separate parts, and it's hard to know what's what and where it comes into play.

I'm referring to strider-runner-core, strider-simple-runner, lib/backchannel.js, job-data-monitor.js, job-monitor.js, etc. (who knowns what else there is for the job workflow..).

It would be nice to simplify some of this workflow. Either by refactor or by some clear documentation.