add clean ant task to clean up after npm in triton, corvair, and triton-route-loader
add clean ant task to clean up after npm in triton, corvair, and triton-route-loader

emecell/react-server,redfin/react-server,szhou8813/react-server,davidalber/react-server,lidawang/react-server,davidalber/react-server,doug-wade/react-server,redfin/react-server,lidawang/react-server,doug-wade/react-server,szhou8813/react-server,emecell/react-server