New saving system with proper waiting for file flush

Command context for servers now supports Respond()
Chat manager now treats the steam ID Sync.MyId as a local destination, and processes the event accordingly.
Save makes better use of Task<>
Restart actually waits for save
PlayerCollectionExtension uses a dictionary lookup for TryGetBySteamId
Shutting the UI window properly closes Torch
Torch Dispose renamed to Destroy, VRage Dispose marked as obsolete (do not use)

Torch.API/ITorchBase.cs

@@ -18,21 +18,25 @@ namespace Torch.API
         /// <summary>
         /// Fired when the session begins loading.
         /// </summary>
+        [Obsolete("Prefer using the TorchSessionManager.SessionStateChanged event")]
         event Action SessionLoading;
-        
+
         /// <summary>
         /// Fired when the session finishes loading.
         /// </summary>
+        [Obsolete("Prefer using the TorchSessionManager.SessionStateChanged event")]
         event Action SessionLoaded;
 
         /// <summary>
         /// Fires when the session begins unloading.
         /// </summary>
+        [Obsolete("Prefer using the TorchSessionManager.SessionStateChanged event")]
         event Action SessionUnloading;
 
         /// <summary>
         /// Fired when the session finishes unloading.
         /// </summary>
+        [Obsolete("Prefer using the TorchSessionManager.SessionStateChanged event")]
         event Action SessionUnloaded;
 
         /// <summary>
@@ -90,15 +94,17 @@ namespace Torch.API
         void Stop();
 
         /// <summary>
-        /// Restart the Torch instance.
+        /// Restart the Torch instance, blocking until the restart has been performed.
         /// </summary>
         void Restart();
 
         /// <summary>
         /// Initializes a save of the game.
         /// </summary>
-        /// <param name="callerId">Id of the player who initiated the save.</param>
-        Task Save(long callerId);
+        /// <param name="timeoutMs">timeout before the save is treated as failed, or -1 for no timeout</param>
+        /// <param name="exclusive">Only start saving if we aren't already saving</param>
+        /// <returns>Future result of the save, or null if one is in progress and in exclusive mode</returns>
+        Task<GameSaveResult> Save(int timeoutMs = -1, bool exclusive = false);
 
         /// <summary>
         /// Initialize the Torch instance.  Before this <see cref="Start"/> is invalid.
@@ -108,7 +114,7 @@ namespace Torch.API
         /// <summary>
         /// Disposes the Torch instance.  After this <see cref="Start"/> is invalid.
         /// </summary>
-        void Dispose();
+        void Destroy();
 
         /// <summary>
         /// The current state of the game this instance of torch is controlling.

Torch.API/Session/GameSaveResult.cs

@@ -0,0 +1,44 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Torch.API.Session
+{
+    /// <summary>
+    /// The result of a save operation
+    /// </summary>
+    public enum GameSaveResult
+    {
+        /// <summary>
+        /// Successfully saved
+        /// </summary>
+        Success = 0,
+
+        /// <summary>
+        /// The game wasn't ready to be saved
+        /// </summary>
+        GameNotReady = -1,
+
+        /// <summary>
+        /// Failed to take the snapshot of the current world state
+        /// </summary>
+        FailedToTakeSnapshot = -2,
+
+        /// <summary>
+        /// Failed to save the snapshot to disk
+        /// </summary>
+        FailedToSaveToDisk = -3,
+
+        /// <summary>
+        /// An unknown error occurred
+        /// </summary>
+        UnknownError = -4,
+
+        /// <summary>
+        /// The save operation timed out
+        /// </summary>
+        TimedOut = -5
+    }
+}

Torch.API/Torch.API.csproj

@@ -187,6 +187,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="ServerState.cs" />
     <Compile Include="ModAPI\TorchAPI.cs" />
+    <Compile Include="Session\GameSaveResult.cs" />
     <Compile Include="Session\ITorchSession.cs" />
     <Compile Include="Session\ITorchSessionManager.cs" />
     <Compile Include="Session\TorchSessionState.cs" />