Updated server bin

Added PluginUpdater stuff.  Very alpha at the moment until we can test more thoroughly.

TShockAPI/PluginUpdater/PluginVersionCheck.cs

@@ -0,0 +1,112 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Text;
+using JsonLoader;
+using Newtonsoft.Json;
+
+namespace TShockAPI.PluginUpdater
+{
+    public class PluginVersionCheck
+    {
+        public delegate void PluginUpdateD(UpdateArgs e);
+        public static event PluginUpdateD PluginUpdate;
+        public static void OnPluginUpdate(UpdateArgs args)
+        {
+            if (PluginUpdate == null)
+            {
+                return;
+            }
+
+            PluginUpdate(args);
+        }
+
+        public static void CheckPlugin(object p)
+        {
+            TerrariaPlugin plugin = (TerrariaPlugin)p;
+            UpdateArgs args = new UpdateArgs {Plugin = plugin, Success = true, Error = ""};
+            List<string> files = new List<string>();
+
+            try
+            {
+                if (!String.IsNullOrEmpty(plugin.UpdateURL))
+                {
+                    var request = HttpWebRequest.Create(plugin.UpdateURL);
+                    VersionInfo vi;
+
+                    request.Timeout = 5000;
+                    using (var response = request.GetResponse())
+                    {
+                        using (var reader = new StreamReader(response.GetResponseStream()))
+                        {
+                            vi = JsonConvert.DeserializeObject<VersionInfo>(reader.ReadToEnd());
+                        }
+                    }
+
+                    System.Version v = System.Version.Parse((vi.version.ToString()));
+
+                    if (!v.Equals(plugin.Version))
+                    {
+                        DownloadPackage pkg;
+                        request = HttpWebRequest.Create(vi.url);
+
+                        request.Timeout = 5000;
+                        using (var response = request.GetResponse())
+                        {
+                            using (var reader = new StreamReader(response.GetResponseStream()))
+                            {
+                                pkg = JsonConvert.DeserializeObject<DownloadPackage>(reader.ReadToEnd());
+                            }
+                        }
+
+                        foreach (PluginFile f in pkg.files)
+                        {
+                            using (WebClient Client = new WebClient())
+                            {
+                                string dir = Path.Combine(TShock.SavePath, "UpdatedPlugins");
+                                if (!Directory.Exists(dir))
+                                    Directory.CreateDirectory(dir);
+
+                                Client.DownloadFile(f.url,
+                                                    Path.Combine(dir, f.destination));
+
+                                files.Add(Path.Combine(dir, f.destination));
+                            }                            
+                        }
+                    }
+                    else
+                    {
+                        args.Error = "Plugin is up to date.";
+                    }
+                }
+                else
+                {
+                    args.Error = "Plugin has no updater recorded.";
+                }
+            }
+            catch(Exception e)
+            {
+                args.Success = false;
+                args.Error = e.Message;
+                if(files.Count > 0)
+                {
+                    foreach(string s in files)
+                    {
+                        File.Delete(s);
+                    }
+                }
+            }
+
+            OnPluginUpdate(args);
+        }
+    }
+
+    public class UpdateArgs
+    {
+        public TerrariaPlugin Plugin { get; set; }
+        public bool Success { get; set; }
+        public string Error { get; set; }
+    }
+}