Add more explicit information to PopDiffSequenceData.html

[zkamvar]

This is from Reviewer #2:

Add this into the data section:

Data: 10 individuals per population, 4 populations, 2 loci (one nuclear, one mitochondrial) in the bees species Eulaema bombiformis

[hlapp]

Looks like this hasn't been done yet, but the manuscript revision is submitted and published. Hence, I'm going to remove the milestone. @mmlopezu will you still get to this, or should someone else take this?