Add some readme files, start fixing docker build.

Docker (and CI in general) build currently isn't generating protobuf files.
Docker image also needs to check that pigpio works.

pycar/build.gradle

@@ -20,6 +20,12 @@ task build(type: Exec, dependsOn: copyPythonCode) {
     args 'setup.py', 'bdist_wheel'
 }
 
+task buildDocker(type: Exec, dependsOn: copyPythonCode) {
+    executable 'docker'
+    workingDir projectDir
+    args 'build', '--build-arg', "PYPI_USERNAME=$System.env.PYPI_USERNAME", '--build-arg', "PYPI_PASSWORD=$System.env.PYPI_PASSWORD", '-t', 'vato.ddns.net:8082/pycar:latest', '.' 
+}
+
 task clean {
     doLast {
         delete 'dist'