root/olares3: links for il2fb-difficulty

root/olares3 il2fb-difficulty-1.3.1.tar.gz
root/olares3 il2fb-difficulty-1.3.0.tar.gz
root/olares3 il2fb-difficulty-1.2.0.tar.gz
root/olares3 il2fb-difficulty-1.1.1.tar.gz
root/olares3 il2fb-difficulty-1.1.0.tar.gz