The model always tracks diagnoses by CD4 count since it doesn't add much overhead, but it only creates the results if advancedtracking=True
If advancedtracking=True:
Add 'numnewdiagcd4' to results.other - the number of diagnoses split by cd4 count - currently not plottable (want to update plotbycd4())
Add 'plotlatediag' to results.other - the proportion of diagnoses that have CD4<200 - plottable as a stacked, total (default) or population
Add 'propundxcd4lt200' to results.other - the proportion of undiagnosed PLHIV with CD4<200 - as a comparison to 'proplatediag' - at the moment has to be a separate plot to 'plotlatediag'
To be merged after the model speedups