Updated README.
Updated README.

TeamPraxis/rrule,clochix/rrule,psnider/rrule,TeamPraxis/rrule,amyhua/rrule,Ribeiro/rrule,amyhua/rrule,moisadoru/rrule,bendavis78/rrule,moisadoru/rrule,psnider/rrule,teambition/rrule,jkbrzt/rrule,jkbrzt/rrule,Ribeiro/rrule,nehakadam/rrule,clochix/rrule,teambition/rrule,nehakadam/rrule,bendavis78/rrule