Minor tweaks

Removed obsolete drawer scripts
Added '# of tracks by trigger tower' plots

Added '# of stubs by trigger tower' plots

Added comparison of trackingParticle pT between TuneZ2star and TuneCUEP6S1
Added coverage vs patterns plots in drawer_patternbank.py
Added nsuperstrips plots (ignore z segmentation) in drawer_layerdisk.py
Fixed bug for projective superstrips where stub eta should be used instead of z

Allowed '--dividePhi' and '--divideEta' to be zero
Updated drawer_amsim.py and drawer_patternbank.py.
Added drawer_roads.py
Added drawer_stubs.py
Changed dZ to dR for disambiguition
Added 'TTStubs_clusWidth' variable

Removed 'TTClusters_hit*' variables
Added copyStubs.C