gemspec: bump celluloid-zmq to 0.17.0.pre1
gemspec: bump celluloid-zmq to 0.17.0.pre1

niamster/dcell,niamster/dcell,dfockler/dcell,celluloid/dcell,dfockler/dcell,celluloid/dcell,dfockler/dcell,celluloid/dcell,niamster/dcell