Add initial file structure for breakouts api

bigbluebutton-html5/imports/api/breakouts/index.js

...utton-html5/imports/api/breakouts/server/eventHandlers.js

bigbluebutton-html5/imports/api/breakouts/server/index.js

bigbluebutton-html5/imports/api/breakouts/server/methods.js

...uebutton-html5/imports/api/breakouts/server/publishers.js

bigbluebutton-html5/imports/ui/components/app/service.js

bigbluebutton-html5/server/main.js