add in isoTrackPlots running option
update error handling for zero entry normalisation
fix HT bin typo
fix normalisation bug for single binned histos
fix normalisation problems in anaPlot class
meet changes to normalisation method
fix typos
add extra methods
new samples; other arbitrary changes
more samples; change the definitions of efficiencies; start introducing new grapher class
new grapher class begins; fix ratio plot range calculator; some hacks, all commented;