"select" = have mouse cursor on it

Features:
1) show enemy worm range on selection. shortcut toggle

2) show your gun range on enemy/attack-able selection. shortcut toggle

Technical Notes:
1) Looks for "turret"s that have "worm-turret" at the end of their name. If an enemy "turret" / worm is missing, post to the discussions

2) If one selects an invulnerable enemy thing, you can't usually shoot at it, but the gun will still show range. Max range for weapon is 100. Above that you won't see range (I could try with artillery cannon to see if it can work...)