Fix the list in the readme
Fix the list in the readme

Alkarex/simplepie,mblaney/simplepie,FreshRSS/simplepie,songfj/simplepie,Alkarex/simplepie,barryvdh/simplepie,skyzyx/simplepie,FreshRSS/simplepie,skyzyx/simplepie,blat/simplepie,songfj/simplepie,blat/simplepie,songfj/simplepie,wikidi/simplepie,barryvdh/simplepie,wikidi/simplepie,mblaney/simplepie,ropik/simplepie,Alkarex/simplepie,simplepie/simplepie,simplepie/simplepie,wikidi/simplepie,barryvdh/simplepie,ropik/simplepie,blat/simplepie