modify gitignore
modify gitignore

yuyaohshimo/device_hackathon_2014,yuyaohshimo/device_hackathon_2014,yuyaohshimo/device_hackathon_2014,yuyaohshimo/device_hackathon_2014,yuyaohshimo/device_hackathon_2014,yuyaohshimo/device_hackathon_2014,yuyaohshimo/device_hackathon_2014