Although the documentation says it defaults to False, it seems to be getting
set to True in my deployments. This explicitely sets it to false and also
sets the TIMEZONE to UTC.
Instead of having everything in the root directory, split them in seperate
directories (appliances, scripts, & configs). This makes things a little
tidier.
Also added a now Makefile target, appliance-list, that prints a list of the
available appliances. The split directory change made this easier.