* [doc] removed <element> syntax
* [doc] removed <element> syntax

Neeeo/incubator-weex,erha19/incubator-weex,kfeagle/weex,Hanks10100/weex,KalicyZhou/incubator-weex,dianwodaMobile/DWeex,houfeng0923/weex,acton393/weex,Tancy/weex,weexteam/incubator-weex,cxfeng1/weex,lvscar/weex,yuguitao/incubator-weex,miomin/incubator-weex,yuguitao/incubator-weex,erha19/incubator-weex,acton393/weex,leoward/incubator-weex,miomin/incubator-weex,cxfeng1/incubator-weex,acton393/incubator-weex,kfeagle/weex,xiayun200825/weex,alibaba/weex,Hanks10100/incubator-weex,kfeagle/weex,HomHomLin/weex,lzyzsd/weex,acton393/incubator-weex,weexteam/incubator-weex,MrRaindrop/incubator-weex,houfeng0923/weex,houfeng0923/weex,KalicyZhou/incubator-weex,KalicyZhou/incubator-weex,Hanks10100/incubator-weex,weexteam/incubator-weex,kfeagle/weex,Hanks10100/incubator-weex,erha19/incubator-weex,zzyhappyzzy/weex,KalicyZhou/incubator-weex,cxfeng1/weex,lvscar/weex,namedlock/weex,Hanks10100/weex,MrRaindrop/incubator-weex,namedlock/weex,Neeeo/incubator-weex,kfeagle/weex,lvscar/weex,bigconvience/weex,misakuo/incubator-weex,LeeJay0226/weex,Neeeo/incubator-weex,MrRaindrop/weex,cxfeng1/weex,erha19/incubator-weex,yuguitao/incubator-weex,leoward/incubator-weex,xiayun200825/weex,acton393/weex,Hanks10100/incubator-weex,lzyzsd/weex,leoward/incubator-weex,acton393/weex,misakuo/incubator-weex,zhangquan/weex,boboning/weex,Tancy/weex,bigconvience/weex,LeeJay0226/weex,acton393/incubator-weex,miomin/incubator-weex,namedlock/weex,xiayun200825/weex,MrRaindrop/weex,yuguitao/incubator-weex,miomin/incubator-weex,bigconvience/weex,houfeng0923/weex,erha19/incubator-weex,cxfeng1/incubator-weex,Neeeo/incubator-weex,dianwodaMobile/DWeex,xiayun200825/weex,zhangquan/weex,lzyzsd/weex,bigconvience/weex,boboning/weex,LeeJay0226/weex,HomHomLin/weex,Hanks10100/incubator-weex,Hanks10100/incubator-weex,acton393/incubator-weex,LeeJay0226/weex,Neeeo/incubator-weex,lvscar/weex,KalicyZhou/incubator-weex,misakuo/incubator-weex,houfeng0923/weex,leoward/incubator-weex,acton393/incubator-weex,misakuo/incubator-weex,Hanks10100/incubator-weex,lzyzsd/weex,HomHomLin/weex,alibaba/weex,Tancy/weex,miomin/incubator-weex,namedlock/weex,xiayun200825/weex,Hanks10100/weex,MrRaindrop/weex,Hanks10100/weex,erha19/incubator-weex,MrRaindrop/incubator-weex,miomin/incubator-weex,dianwodaMobile/DWeex,dianwodaMobile/DWeex,alibaba/weex,zhangquan/weex,weexteam/incubator-weex,dianwodaMobile/DWeex,Hanks10100/weex,alibaba/weex,Tancy/weex,zzyhappyzzy/weex,acton393/weex,Neeeo/incubator-weex,zzyhappyzzy/weex,alibaba/weex,zhangquan/weex,cxfeng1/incubator-weex,cxfeng1/weex,lzyzsd/weex,lzyzsd/weex,cxfeng1/incubator-weex,cxfeng1/weex,erha19/incubator-weex,HomHomLin/weex,KalicyZhou/incubator-weex,zhangquan/weex,misakuo/incubator-weex,lvscar/weex,acton393/incubator-weex,LeeJay0226/weex,MrRaindrop/incubator-weex,Hanks10100/weex,Tancy/weex,dianwodaMobile/DWeex,acton393/incubator-weex,boboning/weex,MrRaindrop/incubator-weex,zhangquan/weex,HomHomLin/weex,cxfeng1/incubator-weex,weexteam/incubator-weex,acton393/weex,namedlock/weex,Tancy/weex,namedlock/weex,alibaba/weex,erha19/incubator-weex,leoward/incubator-weex,yuguitao/incubator-weex,zzyhappyzzy/weex,miomin/incubator-weex,kfeagle/weex,boboning/weex,boboning/weex,LeeJay0226/weex,lvscar/weex,bigconvience/weex,yuguitao/incubator-weex,weexteam/incubator-weex,acton393/incubator-weex,HomHomLin/weex,bigconvience/weex,cxfeng1/incubator-weex,leoward/incubator-weex,xiayun200825/weex,zzyhappyzzy/weex,MrRaindrop/weex,boboning/weex,cxfeng1/weex,MrRaindrop/weex,misakuo/incubator-weex,houfeng0923/weex,zzyhappyzzy/weex,Hanks10100/incubator-weex,miomin/incubator-weex,MrRaindrop/incubator-weex,MrRaindrop/weex,alibaba/weex