Ensure that volume points are created, if they don't exist, when they're
defined in a Dockerfile (#151), and that if we create them, we create
them with 0755 permissions (#152).
When processing RUN instructions or the run command, if we're not
mounting something in a volume's location, create a copy of the volume's
initial contents under the container directory and bind mount that.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Closes: #154
Approved by: rhatdan