IEmulatorServiceProvider - add an AvailableServices property, Service Provider - don't register type object

BizHawk.Emulation.Common/Base Implementations/BasicServiceProvider.cs

@@ -31,6 +31,11 @@ namespace BizHawk.Emulation.Common
 			{
 				Services.Add(coreType, core);
 				coreType = coreType.BaseType;
+
+				if (coreType == typeof(object)) // Don't register object
+				{
+					coreType = null;
+				}
 			}
 		}
 
@@ -69,5 +74,13 @@ namespace BizHawk.Emulation.Common
 		{
 			return Services.ContainsKey(t);
 		}
+
+		public IEnumerable<Type> AvailableServices
+		{
+			get
+			{
+				return Services.Select(d => d.Key);
+			}
+		}
 	}
 }

BizHawk.Emulation.Common/Interfaces/IEmulatorServiceProvider.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 
 namespace BizHawk.Emulation.Common
 {
@@ -25,5 +26,10 @@ namespace BizHawk.Emulation.Common
 		/// Else returns null
 		/// </summary>
 		object GetService(Type t);
+
+		/// <summary>
+		/// A list of all cuurently registered services available to be called
+		/// </summary>
+		IEnumerable<Type> AvailableServices { get; }
 	}
 }