Delta Iteration contract, plan and plan assembler sketch
Implemented runntime for workset iterations.
Fixed shutdown logic in task unit tests.
Fixed port conflicts between unit tests and running nephele instantces.
Implemented JobGraph generation for Workset Iterations.
Reworked compiler post pass to be generic for all flat record models.
Merge branch 'master' of https://github.com/dimalabs/ozone into incremental_iterations