0.1.3

• Videos can now be embedded by enabling the mp4_thumbnails and webm_thumbnails options.
• Added UPLOAD_FILE permission.
• Added max_http_body config.
• Added optional SVG embedding.
• Changed thread locations from /thread/73/ to ?thread=73
• Fixed a security issue by checking client permissions on websockets.
• Fixed bug where permission collections couldn't be deleted from threads.
• Fixed bug where non-HEIC images were deleted when convert_heic_to_jpg was enabled.
• Removed _ROOT_URL and _WEBSOCKET_URL macros, for easier setup.