Not long after Mitch Ziegler became chief executive officer of Reno's Dibbs International, he fielded a call from a much larger company that was interested in buying the technology Dibbs has developed. Ziegler thought about it, swallowed hard and turned down the well-heeled suitor.His thinking: Dibbs can make more money developing the technology itself than it can make selling the software to a third party. Now he faces the test.Founded five years ago, Dibbs has developed an event-and-entertainment app for mobile devices that's won applause from users in Reno and San Francisco.The app, which operates free to the user and …