Added setState documentation
Added setState documentation

Automattic/formsy-react,davidblurton/formsy-react,cdebotton/formsy-react,sdemjanenko/formsy-react,frederickfogerty/formsy-react,sdemjanenko/formsy-react,orokos/formsy-react,blittle/formsy-react,kryogenic/formsy-react,dinodsaurus/formsy-react,paali/formsy-react,tomatau/formsy-react,cdebotton/formsy-react,aesopwolf/formsy,blittle/formsy-react,jaraquistain/formsy-react,nutshellcrm/formsy-react,hanbar/formsy-react,kryogenic/formsy-react,dinodsaurus/formsy-react,davidblurton/formsy-react,tophatmonocle/formsy-react,bitgaming/formsy-react,yesmeck/formsy-react,christianalfoni/formsy-react,etshi/optiopay-form,track0x1/formsy-react,optiopay/optiopay-form,zpalexander/formsy-react,zpalexander/formsy-react,michaelcontento/formsy-react,frederickfogerty/formsy-react,meraki/mki-formsy-react,tomatau/formsy-react,orokos/formsy-react,yesmeck/formsy-react,gullitmiranda/formsy-react,nutshellcrm/formsy-react,Automattic/formsy-react,paali/formsy-react,michaelcontento/formsy-react,tophatmonocle/formsy-react,jaraquistain/formsy-react