GUACAMOLE-626: Update README.md
GUACAMOLE-626: Update README.md

Few additional formatting tweaks
mike-jumper/incubator-guacamole-client,necouchman/incubator-guacamole-client,jmuehlner/incubator-guacamole-client,necouchman/incubator-guacamole-client,glyptodon/guacamole-client,mike-jumper/incubator-guacamole-client,glyptodon/guacamole-client,mike-jumper/incubator-guacamole-client,necouchman/incubator-guacamole-client,glyptodon/guacamole-client,necouchman/incubator-guacamole-client,jmuehlner/incubator-guacamole-client,mike-jumper/incubator-guacamole-client,glyptodon/guacamole-client,jmuehlner/incubator-guacamole-client,glyptodon/guacamole-client,jmuehlner/incubator-guacamole-client