Fixed endgame text

Two player:
-Endgame text for two player was "Yay, you won!!" event though remote player still had
lives left.
-Added a check in RenderEndGame that checks if remote player still has
lives and the level is done. If that is the case, "Waiting for oponent" will be written
instead.

Single player :
-Engame text was always "No more lifes"
-Added a check in RenderEndGame() to see if lives really was 0. If it's
more than 0, "No more levels!" will be rendered instead.