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/Dockerfile

@@ -16,6 +16,13 @@ RUN apt-get install -y \
     libpq-dev \
     && rm -rf /var/lib/apt/lists/*
 
+# PIGPIO - used to control servos.
+RUN wget https://github.com/joan2937/pigpio/archive/master.zip \
+ && unzip master.zip \
+ && cd pigpio-master \
+ && make \
+ && make install \
+ && cd .. && rm -rf pigpio-master master.zip
 
 ARG PYPI_USERNAME
 ARG PYPI_PASSWORD