Replace mod text box by separate tab with workshop support (#263)

* Implement ModList tab which fetches and displays mod information from the workshop.

* ModListEditor: Implement drag and drop ordering, adding, removing and saving.

* Add SteamWorkshopService to VCS

* Add missing file to SteamworkshopService project.

* ModlistControl: Implement checkbox for hiding/showing dependency mods
disable until config is loaded.
design improvements.

* Add documentation for the new classes.

* Comply to naming conventions.

* Update Torch.Server.csproj

* Fix Mod.IsDependency not being serialized when saving

* Remove superfluous update of mod meta data.
Remove commented section in ConfigControl.xaml.

* Optimized SteamworkshopService according to commit review.

* Move SteamWorkshopService to Torch.Utils.SteamworkshopTools

* Remove debug output.

* Don't break stack trace with custom exception in SteamWorkshopTools.

* User ViewModel base class for ModItemInfo instead of implementing INotifyProperty directly.

* Wrap ModListControl in ScrollViewer.

* Rename SteamWorkshopTools utility to WebAPI.

* Revert steamkit call to use dynamic typing for clarity :/

* Mark webAPI based method for downloading workshop content as obsolete.

* Update Torch project definition.

* Disable building Torch client

* Update readme

* Change init order to ensure paths are initialized for plugins

* Reorder exception logging to reduce duplication

* Use thread safe queues in MtObservableCollectionBase

* Revert "Change init order to ensure paths are initialized for plugins"

This reverts commit 3f803b8107.

* Fix layout of ModListControl

* Combine Invokes to reduce allocations

* Replace string comparisons by string.Equals / string.IsNullOrEmpty

* Replace string comparisons by string.Equals / string.IsNullOrEmpty

* Use MtObservableList for Modlist to avoid race conditions.

Torch.Server/Views/Converters/ModToIdConverter.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Windows.Data;
+using System.Threading.Tasks;
+using Torch.Server.ViewModels;
+using NLog;
+using Torch.Collections;
+
+namespace Torch.Server.Views.Converters
+{
+    /// <summary>
+    /// A converter to get the index of a ModItemInfo object within a collection of ModItemInfo objects
+    /// </summary>
+    public class ModToListIdConverter : IMultiValueConverter
+    {
+        /// <summary>
+        /// Converts a ModItemInfo object into its index within a Collection of ModItemInfo objects
+        /// </summary>
+        /// <param name="values">
+        /// Expected to contain a ModItemInfo object at index 0
+        /// and a Collection of ModItemInfo objects at index 1
+        /// </param>
+        /// <param name="targetType">This parameter will be ignored</param>
+        /// <param name="parameter">This parameter will be ignored</param>
+        /// <param name="culture"> This parameter will be ignored</param>
+        /// <returns>the index of the mod within the provided mod list.</returns>
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+        {
+            //if (targetType != typeof(int))
+            //    throw new NotSupportedException("ModToIdConverter can only convert mods into int values or vise versa!");
+            var mod = (ModItemInfo) values[0];
+            var theModList = (MtObservableList<ModItemInfo>) values[1];
+            return theModList.IndexOf(mod);
+        }
+
+        /// <summary>
+        /// It is not supported to reverse this converter
+        /// </summary>
+        /// <param name="values"></param>
+        /// <param name="targetType"></param>
+        /// <param name="parameter"></param>
+        /// <param name="culture"></param>
+        /// <returns>Raises a NotSupportedException</returns>
+        public object[] ConvertBack(object values, Type[] targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotSupportedException("ModToIdConverter can not convert back!");
+        }
+    }
+}