Added the Amphitheater Trail, which is the officially designated single-track footpath up to Sugarloaf Hill. Created using GPS data from multiple sources, with reference to official trail plan at http://www.belmont.gov/Home/ShowDocument?id=11069
Added missing trail segment along Laurel Creek. See city's map of existing trails on pg. 21 at the following link for reference: http://www.cityofsanmateo.org/DocumentCenter/View/45418