Provides plot(), print(), hist() and as.data.frame() methods to
allow comparison of original and normalised data.
Provides the user the ability to set Manual normalisation breaks via
SetManualBreaks(). This is useful when manual breaks are easier to
communicate to a non-technical audience.
Provides an applyto() method that allows the normalisr breask to be
applied to different data. Useful when user wishes to analyse how
normalised values have changed over time.