We have a lobby! (#127)

It's shoddy as hell but it works for our purposes.

Content.Shared/Content.Shared.csproj

@@ -108,6 +108,7 @@
   <ItemGroup>
     <None Include="app.config" />
     <Compile Include="Input\ContentKeyFunctions.cs" />
+    <Compile Include="SharedGameTicker.cs" />
     <Compile Include="SharedNotifyManager.cs" />
     <Compile Include="Utility\ContentHelpers.cs" />
     <Compile Include="GameObjects\Components\Power\SharedSmesComponent.cs" />

Content.Shared/SharedGameTicker.cs

@@ -0,0 +1,94 @@
+using System;
+using System.IO;
+using Lidgren.Network;
+using SS14.Shared.Interfaces.Network;
+using SS14.Shared.Interfaces.Serialization;
+using SS14.Shared.IoC;
+using SS14.Shared.Map;
+using SS14.Shared.Network;
+
+namespace Content.Shared
+{
+    public abstract class SharedGameTicker
+    {
+        protected class MsgTickerJoinLobby : NetMessage
+        {
+            #region REQUIRED
+
+            public const MsgGroups GROUP = MsgGroups.Command;
+            public const string NAME = nameof(MsgTickerJoinLobby);
+            public MsgTickerJoinLobby(INetChannel channel) : base(NAME, GROUP) { }
+
+            #endregion
+
+            public override void ReadFromBuffer(NetIncomingMessage buffer)
+            {
+            }
+
+            public override void WriteToBuffer(NetOutgoingMessage buffer)
+            {
+            }
+        }
+
+        protected class MsgTickerJoinGame : NetMessage
+        {
+            #region REQUIRED
+
+            public const MsgGroups GROUP = MsgGroups.Command;
+            public const string NAME = nameof(MsgTickerJoinGame);
+            public MsgTickerJoinGame(INetChannel channel) : base(NAME, GROUP) { }
+
+            #endregion
+
+            public override void ReadFromBuffer(NetIncomingMessage buffer)
+            {
+            }
+
+            public override void WriteToBuffer(NetOutgoingMessage buffer)
+            {
+            }
+        }
+
+        protected class MsgTickerLobbyStatus : NetMessage
+        {
+            #region REQUIRED
+
+            public const MsgGroups GROUP = MsgGroups.Command;
+            public const string NAME = nameof(MsgTickerLobbyStatus);
+            public MsgTickerLobbyStatus(INetChannel channel) : base(NAME, GROUP) { }
+
+            #endregion
+
+            public bool IsRoundStarted { get; set; }
+            public bool YouAreReady { get; set; }
+            // UTC.
+            public DateTime StartTime { get; set; }
+
+            public override void ReadFromBuffer(NetIncomingMessage buffer)
+            {
+                IsRoundStarted = buffer.ReadBoolean();
+
+                if (IsRoundStarted)
+                {
+                    return;
+                }
+
+                YouAreReady = buffer.ReadBoolean();
+                StartTime = new DateTime(buffer.ReadInt64(), DateTimeKind.Utc);
+            }
+
+            public override void WriteToBuffer(NetOutgoingMessage buffer)
+            {
+                buffer.Write(IsRoundStarted);
+
+                if (IsRoundStarted)
+                {
+                    return;
+                }
+
+                buffer.Write(YouAreReady);
+                buffer.Write(StartTime.Ticks);
+            }
+        }
+    }
+}