.NET Core 3.0 is here! (#784)

* .NET Core 3.0 is here!

* Remove IMemoryManager.cs and its references.

* Add T Math/F.FusedMultiplyAdd(T, T, T). Nits.

* Nit.

* Update appveyor.yml

* Revert "Resolve Visual Studio build issues"

This reverts commit 1772128ce0.

* Update SvcTable.cs

ARMeilleure/Memory/MemoryHelper.cs

@@ -7,7 +7,7 @@ namespace ARMeilleure.Memory
 {
     public static class MemoryHelper
     {
-        public static void FillWithZeros(IMemoryManager memory, long position, int size)
+        public static void FillWithZeros(MemoryManager memory, long position, int size)
         {
             int size8 = size & ~(8 - 1);
 
@@ -22,7 +22,7 @@ namespace ARMeilleure.Memory
             }
         }
 
-        public unsafe static T Read<T>(IMemoryManager memory, long position) where T : struct
+        public unsafe static T Read<T>(MemoryManager memory, long position) where T : struct
         {
             long size = Marshal.SizeOf<T>();
 
@@ -34,7 +34,7 @@ namespace ARMeilleure.Memory
             }
         }
 
-        public unsafe static void Write<T>(IMemoryManager memory, long position, T value) where T : struct
+        public unsafe static void Write<T>(MemoryManager memory, long position, T value) where T : struct
         {
             long size = Marshal.SizeOf<T>();
 
@@ -48,7 +48,7 @@ namespace ARMeilleure.Memory
             memory.WriteBytes(position, data);
         }
 
-        public static string ReadAsciiString(IMemoryManager memory, long position, long maxSize = -1)
+        public static string ReadAsciiString(MemoryManager memory, long position, long maxSize = -1)
         {
             using (MemoryStream ms = new MemoryStream())
             {