Meet the 2015 CNBC Disruptor 50 companies: 1.t Moderna Therapeutics Reprogramming cells to fight disease. 2.t SpaceX Elon Musk's mission to Mars. 3.t Bloom energy Live off the grid; keep the lights on. 4.t Uber A $50 billion on-demand ride. 5.t Airbnb The newest idea in room service: Renting one. 6.t Dropbox Saving a billion files every day. 7.t Palantir Technologies Helped find Bin Laden. Don't like to talk about it. 8.t TransferWise Getting bankers out of the forex biz. 9.t Slack Giving "slack