Support Native Library Docker Builds from Windows

[savageautomate]

RE: https://github.com/Pi4J/pi4j-v2/blob/master/libraries/pi4j-library-pigpio/pom.xml#L283

<!-- TODO :: Reconfigure the build script to execute the Docker commands directly
             instead of bash script (to provide build support for Windows) -->

Add support to the Maven build script to enable building the native libraries via Docker on a Windows-based operating system.

All that needs to be done is to update the maven/ant build instructions to perform the docker build steps directly in the build instructions rather than calling out to a bash shell script. An example of how this can be done is has already been completed in Pi4J v1.4 at: https://github.com/Pi4J/pi4j/blob/develop/1.4/pi4j-native/build.xml