Added the System Folder to the test cpkSolution
CpkCoreService - Added a method to "override" cpk commands. (runSystemKettle)
Only status has this method implemented yet.

CpkEngine - Cleaned some code from inside the reload method, it was getting gigantic

KettleElementType - Removed the safety measure that ensured the transformation always had an output. If the step does not exist an error is returned because the transformation result is 'null'