Add link to learning schedules example to readme.
Add link to learning schedules example to readme.

CamZHU/lightfm,rv816/lightfm,xuq/lightfm,lenovor/lightfm,kidaa/lightfm,alvations/lightfm,shaunstanislaus/lightfm,Geoion/lightfm,paoloRais/lightfm,wavelets/lightfm,igara432/lightfm,maciejkula/lightfm,lyst/lightfm