First draft at implementing generic SIL and generic DAgger#3

BatyLeo wants to merge 8 commits intomainJuliaDecisionFocusedLearning/DecisionFocusedLearningAlgorithms.jl:mainfrom

first-draftJuliaDecisionFocusedLearning/DecisionFocusedLearningAlgorithms.jl:first-draftCopy head branch name to clipboard