Multimedia Endpoints and Data Model Finalization

[gumityolcu]

Thanks to @nazmicancalik for his work on CommentsSchema which was essentially the work needed to solve the multimedia data model issue.

I integrated what he did to media objects and it seems to work fine.

=========== UPDATE ============

I have worked further on medias and as of now:

• We have a seperate file models/Media.js which includes MediaSchema shared by both Event objects and User objects
• User endpoints have "media" field instead of "images" with the following structure:

media: { avatar: MediaSchema, cover: MediaSchema }

• GET, POST, PUT and DELETE endpoints are implemented for avatar and cover:

GET /api/users/:id/avatar DELETE /api/users/:id/cover

etc.