Handy for scripts, now you can have the convenience of always running
with --clean without the overhead of always rebuilding the container.

Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>

We don't really need a terminal, and might not have one.

Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>

If there is a wr command available that doesn't support --auto-clean build
fails, so add --auto-clean to the bootstrap check ...

Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>

Now you can make auto-clean the default behaviour by enabling it in your local
configuration file. If you wish to explictly not use it, then you can specify
the --no-auto-clean command line option.

Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>

If we remove the container because it was out of date (and removeOld was set),
then we should immediately hand off to Create - as we would if the container
didn't exist in the first place.

Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>

Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk>