Added support for processed job status in event
Updated according to comments
removed intent
Moved the constants back to worker
Move job status codes to worker event
Add "unknown" status and use for unitialized jobs

Add a 0 status for jobs which have an unknown status and use this
status instead of a NULL value.
s/JOB/JOB_STATUS/g
Add test to assert return value from job
Add documentation about job status codes
Update CHANGELOG with job status codes
Merge pull request #104 from juriansluiman/feature/job-status

Added support for processed job status in event nr2
adding worker aggregate listeners
fix worker factory
refactoring of the way strategies are attached to the EM of the worker.
remove experiment
output formatting
modified strategies
Adds file watcher strategy
Add listener event with process.pre and process.post events used to bind/unbind strategies
worker loop refactoring