huge commit for advanced stats feature.

broke data out into its own library.
may be breaking changes with existing plugins

Plugins/Stats/Client/Abstractions/IClientStatisticCalculator.cs

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+using System.Threading.Tasks;
+using SharedLibraryCore;
+
+namespace IW4MAdmin.Plugins.Stats.Client.Abstractions
+{
+    public interface IClientStatisticCalculator
+    {
+        Task GatherDependencies();
+        Task CalculateForEvent(GameEvent gameEvent);
+    }
+}

Plugins/Stats/Client/Abstractions/IHitInfoBuilder.cs

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+using IW4MAdmin.Plugins.Stats.Client.Game;
+using SharedLibraryCore;
+
+namespace Stats.Client.Abstractions
+{
+    public interface IHitInfoBuilder
+    {
+        HitInfo Build(string[] log, int entityId, bool isSelf, bool isVictim, Server.Game gameName);
+    }
+}

Plugins/Stats/Client/Abstractions/IServerDistributionCalculator.cs

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+using System.Threading.Tasks;
+
+namespace Stats.Client.Abstractions
+{
+    public interface IServerDistributionCalculator
+    {
+        Task Initialize();
+        Task<double> GetZScoreForServer(long serverId, double value);
+        Task<double?> GetRatingForZScore(double? value);
+    }
+}

Plugins/Stats/Client/Abstractions/IWeaponNameParser.cs

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+using SharedLibraryCore;
+using Stats.Client.Game;
+
+namespace Stats.Client.Abstractions
+{
+    public interface IWeaponNameParser
+    {
+        WeaponInfo Parse(string weaponName, Server.Game gameName);
+    }
+}