rejigger fetchEventSources a bit, add comments
rejigger fetchEventSources a bit, add comments

kleisauke/fullcalendar,rgnevashev/fullcalendar,laoneo/fullcalendar,MeteorAdminz/fullcalendar,deepskyr/fullcalendar,oleg-babintsev/fullcalendar,pietervisser/fullcalendar,avanti-technologies/fullcalendar,rgnevashev/fullcalendar,arshaw/fullcalendar,pietervisser/fullcalendar,arshaw/fullcalendar,rgnevashev/fullcalendar,fullcalendar/fullcalendar,rgnevashev/fullcalendar,pietervisser/fullcalendar,arshaw/fullcalendar,blubberly/fullcalendar,avanti-technologies/fullcalendar,arshaw/fullcalendar,kleisauke/fullcalendar,kleisauke/fullcalendar,deepskyr/fullcalendar,avanti-technologies/fullcalendar,laoneo/fullcalendar,laoneo/fullcalendar,blubberly/fullcalendar,fullcalendar/fullcalendar,deepskyr/fullcalendar,oleg-babintsev/fullcalendar,deepskyr/fullcalendar,fullcalendar/fullcalendar,MeteorAdminz/fullcalendar,MeteorAdminz/fullcalendar,kleisauke/fullcalendar,blubberly/fullcalendar,oleg-babintsev/fullcalendar,avanti-technologies/fullcalendar,fullcalendar/fullcalendar,blubberly/fullcalendar,MeteorAdminz/fullcalendar