Use .tail prefix to optimize JIT-generated code (#13)

* Use .tail to optimize JIT-generated code

* Fix .Tail -> Tailcall

Author: SergeiPavlov

LazyProxy/LazyProxyBuilder.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
@@ -235,6 +235,7 @@ private static TypeBuilder AddMethods(this TypeBuilder typeBuilder, Type type, F
                     generator.Emit(OpCodes.Ldarg, i);
                 }
 
+                generator.Emit(OpCodes.Tailcall);
                 generator.Emit(OpCodes.Callvirt, method);
                 generator.Emit(OpCodes.Ret);