add .DS_Store files to gitignore
add .DS_Store files to gitignore

leonidas/gulp-project-template,rikukissa/chat-client,rikukissa/webpack-project-template,rikukissa/bacon-flux-react,rikukissa/ideas,xmeta/gulp-scaffold,Pinqvin/gulp-project-template,cheapsteak/demo-react-transitiongroup,keenjoe007/gulp-scaffold-template,rikukissa/react-bacon-chat,rikukissa/webpack-project-template,rikukissa/bacon-flux-react,cheapsteak/demo-react-transitiongroup,rikukissa/react-bacon-chat,rikukissa/leaflet-geohash-base,cheapsteak/npmcharts.com,rikukissa/separated-browserify-bundles,cheapsteak/npmcharts.com,keenjoe007/gulp-scaffold-template,koodiklinikka/koodiklinikka.fi,rikukissa/ideas,xmeta/gulp-scaffold,Takushi-U/vue-practice,koodiklinikka/koodiklinikka.fi,cheapsteak/gulp-project-template,rikukissa/chat-client,Pinqvin/gulp-project-template,Takushi-U/vue-practice,xmeta/gulp-scaffold,cheapsteak/gulp-project-template,leonidas/gulp-project-template