added a first pass for running stats on heatmap sources to look at correlations between sources as well as other metrics such as frequency and term length
added a first pass for running stats on heatmap sources to look at correlations between sources as well as other metrics such as frequency and term length

tgbugs/heatmaps,CheerfulTeapot/heatmaps,tgbugs/heatmaps,CheerfulTeapot/heatmaps