card_fields rewrite and magic-modules.mse-include (#21)

Overhauls the card_fields file to allow for template designers more freedom in manipulating data.

Adds magic-modules.mse-include, a large scale include file for building templates in a standardized way. Applying this to existing frames will be coming in future updates.

data/magic.mse-game/card-symbols/menu_choice_images

@@ -0,0 +1,5 @@
+choice images:
+	none:							{ "" }
+	tombstone:						/magic.mse-game/card-symbols/tombstone.png
+	alchemy:						/magic.mse-game/card-symbols/alchemy.png
+	alchemy old:					/magic.mse-game/card-symbols/alchemy old.png