Make extract_stars recognize different conventions for x/y positions

[astrofrog]

I am using the DAOStarFinder to find stars and would like to use this table directly in extract_stars - it would be nice to be able to do this without having to recreate a new table or rename the columns to x/y. Could extract_stars include some heuristics to recognize e.g. xcentroid/ycentroid, as well as xcenter/ycenter and x_peak/y_peak, which are all conventions used in photutils?

[larrybradley]

Yes, I completely agree!