* Add ability for an admin to remove every video on the pod.
* Server: add BlacklistedVideos relation.
* Server: Insert in BlacklistedVideos relation upon deletion of a video.
* Server: Modify BlacklistedVideos schema to add Pod id information.
* Server: Moving insertion of a blacklisted video from the `afterDestroy` hook into the process of deletion of a video.
To avoid inserting a video when it is removed on its origin pod.
When a video is removed on its origin pod, the `afterDestroy` hook is fire, but no request is made on the delete('/:videoId') interface.
Hence, we insert into `BlacklistedVideos` only on request on delete('/:videoId') (if requirements for insertion are met).
* Server: Add removeVideoFromBlacklist hook on deletion of a video.
We are going to proceed in another way :).
We will add a new route : /:videoId/blacklist to blacklist a video.
We do not blacklist a video upon its deletion now (to distinguish a video blacklist from a regular video delete)
When we blacklist a video, the video remains in the DB, so we don't have any concern about its update. It just doesn't appear in the video list.
When we remove a video, we then have to remove it from the blacklist too.
We could also remove a video from the blacklist to 'unremove' it and make it appear again in the video list (will be another feature).
* Server: Add handler for new route post(/:videoId/blacklist)
* Client: Add isBlacklistable method
* Client: Update isRemovableBy method.
* Client: Move 'Delete video' feature from the video-list to the video-watch module.
* Server: Exclude blacklisted videos from the video list
* Server: Use findAll() in BlacklistedVideos.list() method
* Server: Fix addVideoToBlacklist function.
* Client: Add blacklist feature.
* Server: Use JavaScript Standard Style.
* Server: In checkUserCanDeleteVideo, move the callback call inside the db callback function
* Server: Modify BlacklistVideo relation
* Server: Modifiy Videos methods.
* Server: Add checkVideoIsBlacklistable method
* Server: Rewrite addVideoToBlacklist method
* Server: Fix checkVideoIsBlacklistable method
* Server: Add return to addVideoToBlacklist method
This system will be useful to to update some int video attributes
(likes, dislikes, views...)
The classic system is not used because we need some optimization for
scaling
