updated README.md to describe cloud-9 support
updated README.md to describe cloud-9 support
dvdhoek/quora-clone,alxh87/quora-clone,lirenyeo/cut-url-sinatra,lirenyeo/cut-url-sinatra,dvdhoek/bitly-clone,dvdhoek/quora-clone,hollowaykeanho/sinatra-web-server,alxh87/quora-clone,hollowaykeanho/sinatra-web-server,dvdhoek/quora-clone,dvdhoek/bitly-clone,alxh87/quora-clone,lirenyeo/cut-url-sinatra,dvdhoek/bitly-clone,NextAcademy/quora-clone,NextAcademy/quora-clone