Devel changes that need to be rebased

[ariostas]

This is the list of PRs that need to be ported over. Once the CMSSW PR is merged, I'll start going through them. One thing we'll have to decide is whether to collect all the changes in a single PR or do each one independently to check the correctness and performance of each one.

• Add Occupancy Branches #45
• Changes to make standalone run also from within a CMSSW area #36 (some parts)
• LST object build upgrade: change pT5 rz chi2 cut definition into helix approximation #40
• Add pT Runtime Toggle + pT Toggle for Geometry Inputs #39
• Add Low pT Occupancies #54
• Improvements to the README #55
• T5 DNN Cleanup + Training Scripts + Eta/pT Dependent Cut #61
• Remove Redundant Functions + 60% MD Speedup #98
• Fix rzChisquared NaN's on CPU Backend for T5 #97
• DNN Indexing Bug Fix + Normalization Improvements #100
• Implement T3 r-z helix chi2 cuts #92 (except the formatting part)
• Replace t5 Radius Matching with DNN + Pairwise Hit Differences + Make DNN First t5 Cut #103
• Check pT5's in T5 Duplicate Cleaning Before TC #111
• Add Phi to the DNN + Displaced Track Weighting #114
• DBeta Bug Fix #124