allow to skip attributes when rendering default inputs
allow to skip attributes when rendering default inputs

ryanfox1985/formtastic,ConferenceCloud/formtastic,Davidzhu001/formtastic,justinfrench/formtastic,Guestfolio/formtastic,justinfrench/formtastic,Guestfolio/formtastic,ryanfox1985/formtastic,Baltazore/formtastic,EndingChaung/formtastic,mikz/formtastic,thenthen8515/formtastic,nishaya/formtastic,nishaya/formtastic,ryanfox1985/formtastic,sideci-sample/sideci-sample-formtastic,EndingChaung/formtastic,thenthen8515/formtastic,paulodiovani/formtastic,ConferenceCloud/formtastic,justinfrench/formtastic,paulodiovani/formtastic,mikz/formtastic,Davidzhu001/formtastic