add .DS_Store to gitignore
add .DS_Store to gitignore

StudioLabs/devtools-live,StudioLabs/live-edit,sdwilsh/fb-flo,vcarrera/fb-flo,facebook/fb-flo,vjeux/fb-flo,fcoury/fb-flo,siddhartharay007/fb-flo,silvere27/fb-flo,vjeux/fb-flo,vcarrera/fb-flo,StudioLabs/live-edit,Todd-Werelius/fb-flo,silvere27/fb-flo,StudioLabs/devtools-live,facebook/fb-flo,siddhartharay007/fb-flo