Timer

-fixed flag annotation bug, no longer using reusable pin annotation for flagAnno class
-all teammates are blue, all enemies are orange. (we can change this only if we allow a custom annotation for mkuserannotation, but this means sacrificing the standard blinking blue dot...) or we adapt the rest of the game to be like this. i am always blue and my team is always blue, analogous to iphone messages (outgoing are always one color, incoming are always one color)

-added timer to update flag, teammate and enemy locations every 3 seconds