Emit an unsubscribe message when we get disconnected
Emit an unsubscribe message when we get disconnected

rasata/ShareJS,share/ShareJS,freewind/ShareJS,kantele/k-share,gdseller/ShareJS,playcanvas/ShareJS,luto/ShareJS,playcanvas/ShareJS,Nzaga/ShareJS,mcanthony/ShareJS,igmcdowell/ShareJS,dialoghq/ShareJS,kustomzone/ShareJS,gdseller/ShareJS,igmcdowell/ShareJS,matthewbauer/ShareJS,dialoghq/ShareJS,erpframework/ShareJS,dialoghq/ShareJS,modulexcite/ShareJS,a0x/ShareJS