Introduce fluent configuration

[rafek1241]

Currently, there is an options class that contains all settings and it is included in the extension method. It should be possible to set it up fluently by method chaining.

Current:

//rebus configuration
...
                   .Serialization(
                        r => r
                            .UseXmlSerializing(
                                logger,
                                new XmlSerializingOptions()
                                {
                                    IncludeNamespace = true,
                                    DefaultNamespacePrefix = "http://tempuri.net"
                                }
                            )
                    )

Expected:

                   .Serialization(
                        r => r
                            .UseXmlSerializing()
                                .WithLogger(logger)
                                .IncludeNamespace()
                                .WithNamespacePrefix("http://tempuri.net")
                    )

and

var config = new XmlSerializerConfig()
                                .WithLogger(logger)
                                .IncludeNamespace()
                                .WithNamespacePrefix("http://tempuri.net");

...
                   .Serialization(r=> r.UseXmlSerializing(config))