Added note to the README encouraging everyone to open feature requests
Added note to the README encouraging everyone to open feature requests

sandyway/libextobjc,kolyuchiy/libextobjc,KBvsMJ/libextobjc,liuruxian/libextobjc,sanojnambiar/libextobjc,WPDreamMelody/libextobjc,goodheart/libextobjc,telly/libextobjc,sunfei/libextobjc,jiakai-lian/libextobjc,bboyesc/libextobjc