added a check and error message for server version mismatch.
added a check and error message for server version mismatch.

anapsix/rancher,reschrei1/rancher,wlan0/rancher,gpndata/rancher,Rucknar/rancher,dbones/rancher,dx9/rancher,atyenoria/rancher,adamcarlile/rancher,thuongdinh/rancher,thuongdinh/rancher,trukhinyuri/rancher,thuongdinh/rancher,Rucknar/rancher,anapsix/rancher,gpndata/rancher,wlan0/rancher,wlan0/rancher,ostree/rancher,jefflaplante/rancher,adamcarlile/rancher,gpndata/rancher,imikushin/rancher,jefflaplante/rancher,summerQLin/rancher,dx9/rancher,mikedougherty/rancher,jefflaplante/rancher,trukhinyuri/rancher,imikushin/rancher,anapsix/rancher,mikedougherty/rancher,hibooboo2/rancher,trukhinyuri/rancher,atyenoria/rancher,adamcarlile/rancher,ostree/rancher,hibooboo2/rancher,ostree/rancher,summerQLin/rancher,dbones/rancher,reschrei1/rancher,summerQLin/rancher,dbones/rancher,atyenoria/rancher,hibooboo2/rancher