Add setup overloads to avoid the mock T argument

This allows simplified lambdas for setup, so that

```
mock.Setup(x => x.TurnOn());
```
becomes
```
mock.Setup(() => mock.TurnOn());
```

A future version could also add `Setup(() ...)` to Syntax for the same effect.

Author: kzu

src/Moq/Moq/SetupExtension.cs

@@ -11,6 +11,19 @@ namespace Moq
     [EditorBrowsable(EditorBrowsableState.Never)]
     public static class SetupExtension
     {
+        /// <summary>
+        /// Sets up the mock with the given void method call.
+        /// </summary>
+        [SetupScope]
+        public static ISetup Setup<T>(this T mock, Action action)
+        {
+            using (new SetupScope())
+            {
+                action();
+                return DefaultSetup.Default;
+            }
+        }
+
         /// <summary>
         /// Sets up the mock with the given void method call.
         /// </summary>
@@ -36,6 +49,18 @@ public static TResult Setup<T, TResult>(this T mock, Func<T, TResult> function)
             }
         }
 
+        /// <summary>
+        /// Sets up the mock with the given function.
+        /// </summary>
+        [SetupScope]
+        public static TResult Setup<T, TResult>(this T mock, Func<TResult> function)
+        {
+            using (new SetupScope())
+            {
+                return function();
+            }
+        }
+
         /// <summary>
         /// Sets up the mock with the given method reference, typically used to 
         /// access and set ref/out arguments. A code fix will automatically