Eight teams. Nine hours. One monster drought.Stockton’s first “H2o Hackathon” ended Friday with some creative plans to slay that monster drought — ideas like text messages that warn you in real time if you’ve exceeded your water use goals, or games you can play on your smartphone as a reward for taking shorter showers.If you’ve never been to a “hackathon,” imagine brainiacs buried in their laptops, at tables [...]