Predict both lost and extra TICs clientside; smooths things out better

Add an in-progress prediction method using commands; currently disabled

Let ENet handle timeouts itself

Use ENET_NET_TO_HOST_32 instead of doom_b32 when working with IP addresses

Improve bandwidth stats (now called network stats)
Set throttle acceleration and deceleration very low
Set throttling acceleration and deceleration values appropriately; this is kind of a WIP