Unit Defence

Fixed leaderboard (hopefully), only tested with 1 player.
Made players lose lives when creatures get through.
Set all players to allies upon map initialization. (I don't know if it is possible to deliberately turn this off at will though, will have to be tested with multiple players)
Hopefully properly localized for both enUS and enGB.

Attempted to make it so siege tanks can't attack out of their lane, but no luck getting satisfying results.  Might tinkle a bit more with it now and then if I find time or a lightbulb comes flying past my head :p  If I am able to limit attacks to ones own region, the issue with alliance isn't a problem either.