XSockets.NET Sink for Serilog

Would also like to add some example code on how to use it. Seems like that is done on the serilog documentation site right now?
I think the project file might need the root namespace set to `Serilog` for the project layout to work correctly here.

The usual layout puts the `LoggerConfiguration` extensions in the root `Serilog` namespace so that no additional `using` declarations are required for it to become visible.

Then, the nested `/Sinks/XSockets` folder will have the right implied namespace for the other types (they end up in a `Serilog.Sinks.XSockets.Sinks.XSockets.*` namespace in the current PR :))