ServerEntityEventManager doesn't process received events until the character inputs of the client for the corresponding frame have been processed (fixes character movement lagging behind EntityEvents at the servers side)

+ split character networking logic into a separate file, characters drop items at the position of their collider instead of hands

Subsurface/Source/Items/Inventory.cs

@@ -546,7 +546,7 @@ namespace Barotrauma
             syncItemsDelay = 1.0f;
         }
 
-        public void ServerRead(ClientNetObject type, NetIncomingMessage msg, Barotrauma.Networking.Client c)
+        public void ServerRead(ClientNetObject type, NetBuffer msg, Barotrauma.Networking.Client c)
         {
             List<Item> prevItems = new List<Item>(Items);
             ushort[] newItemIDs = new ushort[capacity];
@@ -565,7 +565,7 @@ namespace Barotrauma
             {
                 if (newItemIDs[i] == 0)
                 {
-                    if (Items[i] != null) Items[i].Drop();
+                    if (Items[i] != null) Items[i].Drop(c.Character);
                     System.Diagnostics.Debug.Assert(Items[i]==null);
                 }
                 else
@@ -609,7 +609,7 @@ namespace Barotrauma
             }
         }
 
-        public void ClientRead(ServerNetObject type, NetIncomingMessage msg, float sendingTime)
+        public void ClientRead(ServerNetObject type, NetBuffer msg, float sendingTime)
         {
             receivedItemIDs = new ushort[capacity];