Set game time in GameState requests. Bugfix in point accumulation.
Merge branch 'engine-flags'
Colliding tanks are animated at collision position
Better flag rendering. Also added sound, but it does not play correctly.
Merge branch 'master' into engine-flags
Changed NextMove type to Int32

Defined as milliseconds since midnight, UTC time.
NextMove and Corrected direction

Provides the players with NextMove timestamp
Sets move direction on the tanks even when they are about to crash
Sets the TookFlag parameter on tanks
Added walkover case, if one player process terminates before the game
is over, the opponent gets 5 points.
Refactoring
NextMove updates

Added interpretation function in GameMap to make it easy for the
players to know how much time is left.
Changed the instance handler - the player is now not allowed to move on
GameState creation, but only on the first GameState update. This is
because at GameState creation, the engine will wait for both players to
create their joysticks. After that step is complete, the 1 second timer
starts. So the players should not get to recalculate anything before
the timer starts.