Add WebProxySettings (use when proxying requests) (#370)

* webproxy part 1

* fixed

* Push to MyGet

* WebProxy standalone

* -n true

* nuget --- "-n true"

* AllowAutoRedirect

* .

examples/WireMock.Net.Console.Net452.Classic/MainApp.cs

@@ -105,6 +105,24 @@ namespace WireMock.Net.ConsoleApplication
                     .WithProxy(new ProxyAndRecordSettings { Url = "http://postman-echo.com/get" })
                 );
 
+            server
+                .Given(Request.Create()
+                    .UsingGet()
+                    .WithHeader("postmanecho", "get2")
+                )
+                .RespondWith(Response.Create()
+                    .WithProxy(new ProxyAndRecordSettings
+                    {
+                        Url = "http://postman-echo.com/get",
+                        WebProxySettings = new WebProxySettings
+                        {
+                            Address = "http://company",
+                            UserName = "test",
+                            Password = "pwd"
+                        }
+                    })
+                );
+
             server
                 .Given(Request.Create()
                     .UsingGet()