Multi user support

Big update to support multi user configurations!

New

• Source and Client configurations now have name properties to identify them (required for clients)
• Source configurations can specify Client configurations to scrobble to based on name
• Source/Client naming has validation for uniqueness
• Support multiple clients in config.json
• Plex/Tautulli configurations now also support filtering by libraries and server names
• Logging label will include config name for easier identification
• Clearer documentation and more examples

Changed

• More thorough configuration validation and helpful validation messages (will display missing property, config type, and where it came from IE file)
• Spotify auth status is more clearly displayed on status page
• Maloja existing scrobble check has further been improved by fuzzy matching artist, track, and time played as well as checking all previously successfully scrobbled tracks (since app start)

Deprecated

• Using plex and spotify top-levels props in config.json has been deprecated. These should be moved to the sources property and will be completely removed in the next major version

Breaking Changes

• ENV properties no longer override json properties and are now treated as a separate config (see configuration docs)