DiHiggs Analysis skeleton

Implements a skeleton for a DiHiggsAnalysis. What is in there is not necessarily meaningful here and there, but it adds a structure and a lot of methods needed for accessing objects or sorting purposes that are or will become important for a Higgs analysis.

• resolved analysis: leading higgs gets leading jet paired with closest to it, subleading higgs gets 2 next subleading pt jets
• boosted analysis: leading higgs: leading large R jet, subleading Higgs: subleading largeR jet; both use the leading ghost-associated Variable Radius Track jets for the b-jets

additionally:

• adds 70% btag working point to small r jets
• makes VR ftag sequence work