sim_from_pedigree: simulate multiple chromosomes at once
Rd -> roxygen 4.0.2.9000
Revise indentation in R code
convert2geno: can now handle multiple chromosomes at once
Fix problem in example for convert2geno
Fix some typos in the vignette
sim_from_pedigree: more detail on result in case of multiple chr; handle case xchr=NULL
vignette: discuss simulation of multiple chromosomes