Updated readme with additional CI badges

Added AppVeyor and GitHub workflow badges
Add CMake instructions for Code::Blocks

README.md

@@ -1,10 +1,20 @@
-# BACnet Stack [![Build Status](https://travis-ci.com/bacnet-stack/bacnet-stack.svg?branch=master)](https://travis-ci.com/bacnet-stack/bacnet-stack)
+# BACnet Stack 
 
 BACnet open source protocol stack for embedded systems, Linux, and Windows
 http://bacnet.sourceforge.net/
 
 Welcome to the wonderful world of BACnet and true device interoperability!
 
+Continuous Integration
+----------------------
+
+This library uses various automated continuous integration services 
+to assist in validation and testing of robust C code and BACnet functionality.
+
+GitHub Workflow [![Actions Status](https://github.com/bacnet-stack/bacnet-stack/workflows/CMake/badge.svg)](https://github.com/bacnet-stack/bacnet-stack/actions)
+Travis CI [![Build Status](https://travis-ci.com/bacnet-stack/bacnet-stack.svg?branch=master)](https://travis-ci.com/bacnet-stack/bacnet-stack) 
+AppVeyor CI [![Build status](https://ci.appveyor.com/api/projects/status/5lq0d9a69g7ixskm/branch/master?svg=true)](https://ci.appveyor.com/project/skarg/bacnet-stack/branch/master)
+
 About this Project
 ------------------
 
@@ -67,8 +77,8 @@ as well as various controllers and workstations. It has been included
 in many products that successfully completed BTL testing.
 
 Using the Makefile in the project root directory, a dozen sample applications
-are created that run under Windows or Linux. They use the BACnet/IP datalink
-layer for communication by default, but could be compiled to use BACnet 
+are created that run under Windows or Linux. They use the BACnet/IPv4 datalink
+layer for communication by default, but could be compiled to use BACnet IPv6, 
 Ethernet, ARCNET, or MS/TP.
 
 Linux/Unix/Cygwin
@@ -81,12 +91,24 @@ Windows MinGW Bash
 
 Windows Command Line
 
-    c:> build.bat
+    c:\> build.bat
 
 The BACnet stack can be compiled by a variety of compilers.  The most common
 free compiler is GCC (or MinGW under Windows).  The makefiles use GCC by
 default.
 
+The library is also instrumented to use [CMake](https://cmake.org/) which can
+generate a project or Makefiles for a variety of IDE or compiler. For example,
+to generate a Code::Blocks project:
+
+    $ mkdir build
+    $ cd build/
+    $ cmake .. -G"CodeBlocks - Unix Makefiles"
+    
+    c:\> mkdir build
+    c:\> cd build/
+    c:\> cmake .. -G"CodeBlocks - MinGW Makefiles"
+
 The demo applications are all client applications that provide one main BACnet
 service, except the one server application and one gateway application.  
 Each application will accept command line parameters, and prints the output to