fix progressbar in docker push
Remove old debug from tarsum
Make sure the cache lookup returns always the same result
Log files name along with their checksum in TarSum + add a Method to retrieve the checksum map
Change BuildFile in order to use TarSum instead of custom checksum
Hash the sums for directory (ureadable when there is too many
simplify the volumes documentation and mention more details
Update for Ubuntu 13.10

With two additional commands, this procedure will work for Ubuntu 13.10 using the image stackbrew/ubuntu:13.10.

1) change /etc/pam.d/sshd, pam_loginuid line 'required' to 'optional'
2) echo LANG=\"en_US.UTF-8\" > /etc/default/locale
Mention lxc-checkconfig

This is important because the list below is not complete when one build one's own kernel.  Plus it is more robust in the face of changes.
Implement suggestions
Mac OSX command for pip was incorrect
Merge pull request #3419 from newzealandpaul/master

Mac OS X command in docs for pip fixed
Add stubbed and commented "/etc/default/docker" to our deb package

This is to especially fix FPM 1.0+ complaining that we told it we have an /etc/default/docker "config file", but didn't actually include one.
Merge pull request #3427 from tianon/stub-deb-init-config

Add stubbed and commented "/etc/default/docker" to our deb package
Merge pull request #3287 from vieux/fix_progressbar_display_push

fix progressbar in docker push
Merge pull request #3353 from creack/improve_add_cache

Improve add cache
Merge pull request #3399 from rgstephens/patch-1

Update for Ubuntu 13.10
Keep original transcript in Thatcher's voice

and clarify that this is an update to the example.
Merge pull request #3409 from Chris00/patch-1

Mention lxc-checkconfig
Added some 1.7 API updates that were missing from 1.8