MTG Art Downloader v1.1.4

Changelog:

• Added threading support, downloads are much faster
• Added support for more sets, and special case sets
• Moved special case set rules to two json files: codes.json (replaces scryfall set code with mtgpics set code) and special.json (special sets that require different downloading behaviors)
• Fixed some minor bugs
• New settings:
• • Include.Extras: Include cards marked as "extras" by scryfall, such as legacy championship cards
• • Threads.Per.Second: How many new download threads are added to the queue per second, increase this number if you have very good internet, lower this number for slow internet, default is 10.
• No longer pick basic or detailed list, now you just press enter when the app loads and the download process adapts to each line. Therefore you can intermingle named lines like "Demonic Tutor" with specific lines such as "TSR-- Demonic Tutor"
• Updated README