update doc to current way to run tickcluster to spawn generic programs
update doc to current way to run tickcluster to spawn generic programs

esatterwhite/skyring,uber-node/ringpop-node,hotrannam/ringpop,Collin-V/ringpop,hj3938/ringpop,esatterwhite/skyring,uber/ringpop,tomasdiez/ringpop,uber-node/ringpop-node,sasa233/ringpop,uber/ringpop-node,uber/ringpop-node