Custom Colors

[Senryoku]

Adds a settings in Custom Card Lists to specify custom colors and mana symbols.

[Settings]
{
	"withReplacement": true,
	"colors": [
		{"id": "NewA", "symbol": "{NewA}", "name": "NewA", "basic": "NewA"}, 
		{"id": "NewB", "symbol": "{NewB}", "name": "NewB", "basic": "NewB"}
	],
	"symbols": [
		{"symbol": "{NewA}", "icon": "https://svgs.scryfall.io/card-symbols/T.svg", "cmc": 1, "colors": ["NewA"]},
		{"symbol": "{NewB}", "icon": "https://svgs.scryfall.io/card-symbols/Q.svg", "cmc": 1, "colors": ["NewB"]}
	]
}

• Parsing
  Kinda, format will probably evolve quite a bit.
• Color balancing support.
• UI Support
  That's the hard part.