Refactor API Slides

.../imports/api/chat/server/modifiers/addChatToCollection.js

bigbluebutton-html5/imports/api/common/server/helpers.js

...ts/api/presentations/server/methods/switchSlideMessage.js

...ports/api/presentations/server/modifiers/eventHandlers.js

...uebutton-html5/imports/api/slides/server/eventHandlers.js

...n-html5/imports/api/slides/server/handlers/slideChange.js

...n-html5/imports/api/slides/server/handlers/slideResize.js

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

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

...on-html5/imports/api/slides/server/methods/switchSlide.js

...ports/api/slides/server/modifiers/addSlideToCollection.js

...imports/api/slides/server/modifiers/changeCurrentSlide.js

...orts/api/slides/server/modifiers/clearSlidesCollection.js

...ts/api/slides/server/modifiers/clearSlidesPresentation.js

...5/imports/api/slides/server/modifiers/displayThisSlide.js

...-html5/imports/api/slides/server/modifiers/resizeSlide.js

...luebutton-html5/imports/api/slides/server/publications.js

bigbluebutton-html5/imports/api/slides/server/publishers.js

bigbluebutton-html5/imports/utils/mimeTypes.js

bigbluebutton-html5/package.json