Skin Restorer

Added

• Added Japanese translation (#100) - undefined9651
• Added fallback providers support for automatic skin fetch (#102) - Carto1a

Changed

• Renamed autoFetch.provider to autoFetch.providers (now a list, automatically migrated from old format)
• Improved German, Hindi, Hungarian, Ukrainian, and Simplified Chinese translations
• Improved performance and stability by running skin fetches on a dedicated thread pool

Fixed

• Fixed player login hanging when a skin provider accepts the connection but never responds
• Fixed saved skins being lost if the server crashed while saving (skin files are now written atomically)
• Fixed a possible crash when using the collection provider with certain seeds
• Fixed provider skin caches growing without an upper bound
• Fixed the HTTP client not being closed when reloading the config