Updates movement packets & Fastwalk (#324)

- [X] Updates Movement packets
- [X] Adds OSI fastwalk packets. These aren't used on OSi anymore.
- [X] Adds new movement handling, but looks like the client doesn't use it. (Also leaving the 0x4000 Character List Flag off)
- [X] Adds time sync request handler, but also looks like the client doesn't use it.
- [X] Adds time sync response for time sync, just in case, but it isn't used, so not sure about the arguments.
- [X] Reimplements RunUO's fastwalk to use a circular array on the netstate instead of every mobile
- [X] Removes ClearFastwalkStack from RunUO implementation. This shouldn't be needed anymore

Changed fastwalk settings:
```cs
        public static int WalkFootDelay { get; set; } = 440;
        public static int RunFootDelay { get; set; } = 220;
        public static int WalkMountDelay { get; set; } = 220;
        public static int RunMountDelay { get; set; } = 110;

        public static bool EnableFastwalkPrevention { get; set; } = true;
        public static AccessLevel FastwalkExemptionLevel { get; set; } = AccessLevel.Counselor;

        // If this is changed during runtime, then the steps array needs resizing.
        public static int MaxSteps { get; private set; } = 4;
```

modernuo.json
```json
{
  "settings": {
    "movement.delay.runFoot": "220",
    "movement.delay.runMount": "110",
    "movement.delay.walkFoot": "440",
    "movement.delay.walkMount": "220",
    "movement.enableFastWalkPrevention": "True",
    "movement.fastwalkExemptionLevel": "Counselor",
    "movement.maxSteps": "4"
  }
}
```

Notes about OSI fastwalk:
While it does work, I can't find a benefit in using it because of the variable speeds. If players moved at a single speed then we could refill the stack every X milliseconds with 6 keys and use a naive token bucket implementation.
Unfortunately variable speeds mount/run/walk/etc means we would have to use a leaky bucket algorithm.
If we are using a leaky bucket algorithm with a variable leak, then we don't need to send tokens because we are already tracking it on the server side.

ModernUO vs OSI Fastwalk:
When the fastwalk was implemented on OSI, it used up to 6 tokens. These tokens were probably distributed every 600-750 milliseconds. To get the same effect, the new fastwalk settings might need to be adjusted. I would tweak them and feel free to let me know what worked for you!

Bumps release version

Projects/Server/Network/NetState/NetState.Fastwalk.cs

@@ -0,0 +1,92 @@
+/*************************************************************************
+ * ModernUO                                                              *
+ * Copyright 2019-2020 - ModernUO Development Team                       *
+ * Email: hi@modernuo.com                                                *
+ * File: NetState.Fastwalk.cs                                            *
+ *                                                                       *
+ * This program is free software: you can redistribute it and/or modify  *
+ * it under the terms of the GNU General Public License as published by  *
+ * the Free Software Foundation, either version 3 of the License, or     *
+ * (at your option) any later version.                                   *
+ *                                                                       *
+ * You should have received a copy of the GNU General Public License     *
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+using CalcMoves = Server.Movement.Movement;
+
+namespace Server.Network
+{
+    public partial class NetState
+    {
+        private int _stepIndex;
+        private int _stepCount;
+        private long _startDelay;
+        private long[] _stepDelays;
+
+        public bool AddStep(Direction d)
+        {
+            if (Mobile == null)
+            {
+                return false;
+            }
+
+            var maxSteps = CalcMoves.MaxSteps;
+
+            _stepDelays ??= new long[maxSteps];
+            var length = _stepDelays.Length;
+
+            var index = _stepIndex - _stepCount;
+            if (index < 0)
+            {
+                index += length;
+            }
+
+            var now = Core.TickCount;
+            var last = _startDelay;
+
+            // Discard old steps by decrementing the step counter
+            while (index != _stepIndex || _stepCount >= maxSteps)
+            {
+                var step = _stepDelays[index++];
+                if (now - last < step)
+                {
+                    break;
+                }
+
+                last += step;
+                _stepCount--;
+                if (index >= length)
+                {
+                    index = 0;
+                }
+            }
+
+            _startDelay = last;
+
+            // If we are out of steps, fail
+            if (_stepCount >= maxSteps)
+            {
+                return false;
+            }
+
+            var delay = Mobile.ComputeMovementSpeed(d);
+
+            // Add the delay
+            _stepDelays[_stepIndex++] = delay;
+
+            if (_stepIndex >= length)
+            {
+                _stepIndex = 0;
+            }
+
+            if (_stepCount == 0)
+            {
+                _startDelay = now;
+            }
+            _stepCount++;
+
+            return true;
+        }
+    }
+}