San Francisco Chronicle: A Bay Area jeansmaker clothed miners in the dusty Sierra Nevada gold fields, creating what would become a fashion staple around the globe. Nearly a century later, two Stanford graduates birthed the high-tech age in a Palo Alto garage. Today, Bay Area entrepreneurs, scientists and policymakers hope to join the vanguard of another revolution – one that aims to reinvent the way people use water, power their cars, build their houses and live their lives. President Obama has …