remove temp files
updated android target version
working ObjectPool

samlpe of usage is:
'''
private ObjectPool<Bullet> bulletPool = new
ObjectPool<Bullet>(Bullet.factory);
for (int i = 0; i < 1000; i++)
{
Bullet bullet = bulletPool.allocate();
bullet.time = rnd.nextFloat() * 0.5f + 1.5f;
}

for (Iterator<Bullet> it = bulletPool.iterator(); it.hasNext();)
{
Bullet item = it.next();

item.time -= dt;

if (item.time < 0)
{
it.remove();
}
}
'''