fixes to checkbox plugin - events are now fired correctly
fixes to checkbox plugin - events are now fired correctly

beealone/jstree,duzun/jstree,aihua/jstree,Contagious06/jstree,patmoore/jstree,Aliccer/jstree,iCasa/jstree,Contagious06/jstree,AnuchitPrasertsang/jstree,Aliccer/jstree,Project-TF/jstree,aihua/jstree,vakata/jstree,opencmii/jstree,500tech/jstree,jacksonpradolima/jstree,neogis-de/jstree,JuseChen/jstree,ninvfeng/jstree,500tech/jstree,Project-TF/jstree,Contagious06/jstree,beealone/jstree,samokspv/jstree,sadfuzzy/jstree,aihua/jstree,iCasa/jstree,codio/jstree,sadfuzzy/jstree,samokspv/jstree,Aliccer/jstree,neogis-de/jstree,opencmii/jstree,gustavobg/jstree,patmoore/jstree,codio/jstree,samokspv/jstree,gustavobg/jstree,sadfuzzy/jstree,ninvfeng/jstree,500tech/jstree,jacksonpradolima/jstree,ninvfeng/jstree,AnuchitPrasertsang/jstree,neogis-de/jstree,beealone/jstree,vakata/jstree,iCasa/jstree,opencmii/jstree,JuseChen/jstree,duzun/jstree,gustavobg/jstree,jacksonpradolima/jstree,JuseChen/jstree