/// <summary>
/// Dequeues the next wave and starts it.
/// </summary>
void StartWave()
{
currentEnemyWave = enemyWaves.Dequeue();
//get the total number of enemies in that wave
//which will be decremented upon each enemy death
numEnemiesInCurrentWave = currentEnemyWave.GetTotalNumberOfEnemies();
//pass the wave to the enemy spawner
//for it to spawn
enemySpawner.SetSpawnPool(currentEnemyWave);
}