Moved event stuff to a non-manager NS.

Core assembly concept: Assemblies that will never need to get unloaded (Torch.API, Torch, Torch.Server)
Event shims and patch shims on the core assemblies.

Torch.API/Managers/Event/EventHandlerAttribute.cs

@@ -1,28 +0,0 @@
-using System;
-
-namespace Torch.API.Managers.Event
-{
-    /// <summary>
-    /// Attribute indicating that a method should be invoked when the event occurs.
-    /// </summary>
-    [AttributeUsage(AttributeTargets.Method)]
-    public class EventHandlerAttribute : Attribute
-    {
-        /// <summary>
-        /// Events are executed from low priority to high priority.
-        /// </summary>
-        /// <remarks>
-        /// While this may seem unintuitive this gives the high priority events the final say on changing/canceling events.
-        /// </remarks>
-        public int Priority { get; set; } = 0;
-
-        /// <summary>
-        /// Specifies if this handler should ignore a consumed event.
-        /// </summary>
-        /// <remarks>
-        /// If <see cref="SkipCancelled"/> is <em>true</em> and the event is cancelled by a lower priority handler this handler won't be invoked.
-        /// </remarks>
-        /// <seealso cref="IEvent.Cancelled"/>
-        public bool SkipCancelled { get; set; } = false;
-    }
-}

Torch.API/Managers/Event/IEvent.cs

@@ -1,11 +0,0 @@
-namespace Torch.API.Managers.Event
-{
-    public interface IEvent
-    {
-        /// <summary>
-        /// An event that has been cancelled will no be processed in the default manner.
-        /// </summary>
-        /// <seealso cref="EventHandlerAttribute.SkipCancelled"/>
-        bool Cancelled { get; }
-    }
-}

Torch.API/Managers/Event/IEventHandler.cs

@@ -1,9 +0,0 @@
-namespace Torch.API.Managers.Event
-{
-    /// <summary>
-    /// Interface used to tag an event handler.  This does <b>not</b> register it with the event manager.
-    /// </summary>
-    public interface IEventHandler
-    {
-    }
-}

Torch.API/Managers/Event/IEventManager.cs

@@ -1,27 +0,0 @@
-using System.Runtime.CompilerServices;
-
-namespace Torch.API.Managers.Event
-{
-    /// <summary>
-    /// Manager class responsible for registration of event handlers.
-    /// </summary>
-    public interface IEventManager
-    {
-        /// <summary>
-        /// Registers all event handler methods contained in the given instance 
-        /// </summary>
-        /// <param name="handler">Instance to register</param>
-        /// <returns><b>true</b> if added, <b>false</b> otherwise</returns>
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        bool RegisterHandler(IEventHandler handler);
-
-
-        /// <summary>
-        /// Unregisters all event handler methods contained in the given instance 
-        /// </summary>
-        /// <param name="handler">Instance to unregister</param>
-        /// <returns><b>true</b> if removed, <b>false</b> otherwise</returns>
-        [MethodImpl(MethodImplOptions.NoInlining)]
-        bool UnregisterHandler(IEventHandler handler);
-    }
-}