Request to add total variant counts to TvTi plots.

[kkrysiak]

Perhaps above or below the plots, indicate the number of variants that are used to display the proportions of the different nucleotide changes. In my case, I have a few individuals with very few variants contributing to this output, which visually throws off the plot. Noting that above I believe would solve this issue.

[zlskidmore]

The new version produces a more complex plot which displays both proportions and frequencies