Wrap experiments into user-friendly class

[myxie]

There is a lot of similarity in the different experiment code both for

• For pure algorithmic comparison (e.g. using SHADOW library)
• and for TopSim simulations

We should be able to provide a common Python interface that coordinates all necessary components (e.g. all different user-defined implementations for TopSim) and provides a cleaner runner for experiments.

e = ShadowExperiment(algorithms=['fcfs'], plan='plan_config.json'). 
e.run(verbose=False). 

e = SimExperiment( planning=['None', 'heft', scheduling=['batch', 'queue'] , plan='plan_config.json'). 
e.run(verbose=True)