add checkboxes
add checkboxes

capriza/jsonform,widgetworks/jsonform,nishant8BITS/jsonform,imkevinyang/jsonform,joshfire/jsonform,jsonform/jsonform,nishant8BITS/jsonform,ulion/jsonform,suricactus/jsonform,ulion/jsonform,iainbeeston/jsonform,yklykl530/jsonform,imkevinyang/jsonform,jsonform/jsonform,mrthan/jsonform-rails,suricactus/jsonform,joshfire/jsonform,tagyangyang/jsonform,tagyangyang/jsonform,widgetworks/jsonform,globocom/jsonform,globocom/jsonform,capriza/jsonform