don't treat already unsubscribed as an error
don't treat already unsubscribed as an error

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