Poppr version 2.8.5

This version of poppr will change the behavior of the poppr() function slightly. It will return the "Pop" and "File" columns as characters, not factors (discussed in #212). If you have been relying on this output to be a factor, it is possible to retain the old method by using:

res <- poppr(data, ...)
res$Pop <- factor(res$Pop)
res$File <- factor(res$File)