Updating base svg to remove references to aufs and lxc.
Exported new png's from layers.
Docker-DCO-1.1-Signed-off-by: Andy Rothfusz <github@developersupport.net> (github: metalivedev)
Add parent reference arrow.

Docker-DCO-1.1-Signed-off-by: Andy Rothfusz <github@developersupport.net> (github: metalivedev)
Merge pull request #4679 from metalivedev/updateimages

Update images to remove references to AUFS, LXC