Implement clock reduction on SystemRecipe

[t-lohse]

Currently clock reduction is performed on TransitionSystem, and before it can be performed, a SystemRecipe has to be cloned and then compiled into a TransitionSystem. This (somewhat) contradicts the point of clock reuctions, since we construct the entire TranstionSystem without clock reduction to perform it.
To improve the performance of Reveaal, this analysis could be moved to SystemRecipe. The current implementation is very vigorous, and could be used as a benchmarking/comparison tool for a future version.