Update mkimage-debian.sh now that wheezy is officially the stable release - also, we can't rely on "release" versions for testing or unstable - only "stable" has reliable release versions
add arch field to image struct
set architecture to x86_64 by default

We're going to hardcode architecture to amd64 for now.
This is a stub and will have to be changed to set the actual arch.
add error handling
imporved error, push, import insert
ensure valid json
fix json encoding, and use less casts
remove hijack on the client in logs, and split stdout / stderr
documentation
Cereate a new registry object for each request (~session)
Update tests with new cookies for registry
allmaintainers.sh: print a flat list of all maintainers of a directory (including sub-directories)
Fixed formatting of CONTRIBUTING.md
Improved wording of a maintainer's responsibilities
Removed debug output in 'docker version'
improve attach
fix ps output
Merge pull request #740 from dotcloud/ps_output-fix

fix ps output
bump to master
Merge branch 'master' into split_stdout_stderr_run-feature