Added documentation section to README (#656)

Author: mmoo9154

README.md

@@ -1,4 +1,4 @@
-SSH.NET
+SSH.NET
 =======
 SSH.NET is a Secure Shell (SSH-2) library for .NET, optimized for parallelism.
 
@@ -7,7 +7,23 @@ SSH.NET is a Secure Shell (SSH-2) library for .NET, optimized for parallelism.
 [![Build status](https://ci.appveyor.com/api/projects/status/ih77qu6tap3o92gu/branch/develop?svg=true)](https://ci.appveyor.com/api/projects/status/ih77qu6tap3o92gu/branch/develop)
 
 ## Introduction
-This project was inspired by **Sharp.SSH** library which was ported from java and it seems like was not supported for quite some time. This library is a complete rewrite, without any third party dependencies, using parallelism to achieve the best performance possible.
+This project was inspired by **Sharp.SSH** library which was ported from java and it seems like was not supported
+for quite some time. This library is a complete rewrite, without any third party dependencies, using parallelism
+to achieve the best performance possible.
+
+## Documentation
+There is MSDN-style class documentation in a .chm file for each release, which you can find in the Assets section
+of the [latest release](https://github.com/sshnet/SSH.NET/releases/latest) page.  Please note that you will need
+to [right-click and "unblock"](https://support.microsoft.com/en-us/help/2021383/some-chm-files-may-not-render-properly-on-windows-vista-and-windows-7)
+the CHM file after you download it.
+
+Currently (4/18/2020), the documentation is very sparse.  Fortunately, there are a large number of tests in
+[Renci.SshNet.Tests](https://github.com/sshnet/SSH.NET/tree/develop/src/Renci.SshNet.Tests) that demonstrate
+usage with working code.
+
+If the test for the functionality you would like to see documented is not complete, then you are cordially
+invited to read the source, Luke, and highly encouraged to generate a pull request for the implementation of
+the missing test once you figure things out.  🤓
 
 ## Features
 * Execution of SSH command using both synchronous and asynchronous methods