Playlist-updates, and general fixes

Features

• Intelligent list feature
• Client-defined colors in channels
• Functionality for skipping through RESTApi (API-token gated)
• Add song from playlist to other playlist button
• Tags/categories in channel, and search on song-categories withing playlist
• Add gay-pride banner on a given date
• Add feature for "silent-join" in socket.io-connection (doesn't count towards view-count)

Smaller updates/fixes

• Import/export improvements
• Chat-fixes surrounding banning users
• Total viewers fixes
• SoundCloud play-fixes surrounding iframed player and js-player
• RESTApi fixes
• CSS and Design-updates
• Security updates
• General bugfixes