Common setting for debug strings

Each unit in the game has a maximum of three debug strings it can display at once. So you can't have more than 3 debug strings set during a round on a single unit. I propose we adopt the following standard:

Index 0: Unit state (Exploring, travelling to known location, attacking, retreating, etc.)
Index 1: Messaging Strings (Id, message, location, ...)
Index 2: Anything else.