Documentation: Adding a separate v2 and a v3 API binding for C++
Documentation: Adding a separate v2 and a v3 API binding for C++

To draw the attention of the community to these.

gyuho/etcd,mkumatag/etcd,visheshnp/etcd,ajityagaty/etcd,li-ang/etcd,gyuho/etcd,ajityagaty/etcd,fanminshi/etcd,mqliang/etcd,xiang90/etcd,rnaveiras/etcd,lorneli/etcd,armstrongli/etcd,whuwxl/etcd,coreos/etcd,a-robinson/etcd,YuleiXiao/etcd,bluebreezecf/etcd,yudai/etcd,sebrandon1/etcd,a-robinson/etcd,etcd-io/etcd,joshix/etcd,plasticbox/etcd,coreos/etcd,mickep76/etcd,xiang90/etcd,YuleiXiao/etcd,etcd-io/etcd,visheshnp/etcd,fanminshi/etcd,sebrandon1/etcd,sinsharat/etcd,rnaveiras/etcd,glevand/coreos--etcd,vimalk78/etcd,plasticbox/etcd,armstrongli/etcd,mqliang/etcd,cockroachdb/etcd,lorneli/etcd,whuwxl/etcd,li-ang/etcd,cockroachdb/etcd,heyitsanthony/etcd,mkumatag/etcd,joshix/etcd,bdarnell/etcd,bluebreezecf/etcd,mqliang/etcd,akauppi/etcd,sinsharat/etcd,glevand/coreos--etcd,etcd-io/etcd,yudai/etcd,vimalk78/etcd,bdarnell/etcd,dannysauer/etcd,heyitsanthony/etcd,rnaveiras/etcd,akauppi/etcd,ajityagaty/etcd,dannysauer/etcd,mkumatag/etcd,mickep76/etcd