More documentation added in fos.py
More documentation added in fos.py

samuelstjean/dipy,jyeatman/dipy,villalonreina/dipy,FrancoisRheaultUS/dipy,nilgoyyou/dipy,rfdougherty/dipy,mdesco/dipy,villalonreina/dipy,maurozucchelli/dipy,demianw/dipy,StongeEtienne/dipy,demianw/dipy,StongeEtienne/dipy,nilgoyyou/dipy,jyeatman/dipy,JohnGriffiths/dipy,oesteban/dipy,sinkpoint/dipy,matthieudumont/dipy,maurozucchelli/dipy,maurozucchelli/dipy,JohnGriffiths/dipy,Messaoud-Boudjada/dipy,sinkpoint/dipy,Messaoud-Boudjada/dipy,matthieudumont/dipy,beni55/dipy,oesteban/dipy,rfdougherty/dipy,FrancoisRheaultUS/dipy,mdesco/dipy,samuelstjean/dipy,beni55/dipy,samuelstjean/dipy