Collectible Card Game Headquarters

Tentative target release date: Friday January 18.

I added an option to preferences that allows users to enable/disable. I've since realised that I should have just replaced the devmode check with the new one instead adding it as an extra check. I don't think I'll have a chance before Thursday to make the change, so if anyone else wants the option before then, to play with deck legality enforcement on while keeping dev mode enabled, you'd simply need to remove !Preferences.DEV_MODE from the line "if (!Preferences.DEV_MODE && Singletons.getModel().getPreferences().getPrefBoolean(FPref.ENFORCE_DECK_LEGALITY)) {" in CSubmenuConstructed.java