Allow comments in /etc/sub{gu}id files

My (unmodified) files in ubuntu utopic have comments (via the standard '#'
syntax) in them; we shouldn't fail when parsing these files.

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Add the 'lxc restart' command

Closes #25

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Merge pull request #36 from tych0/restart

Restart