Fst PCA

Matteo Fumagalli has been working on methods to estimate Fst and doing PCA based on ANGSD output files.

Fst

1. Generate .sfs files from each population using ANGSD RealSFS
   1. using a 2D-SFS as a prior, estimated using ngs2dSFS
   2. using marginal spectra as priors, estimated using optimSFS
   3. here we don't provide prior files, so we directly provide posterior probabilities (ANGSD+sfstools), and therefore we do not correct